Method of inhibition of vascular development using an antibody

ABSTRACT

Tie1 and Tie2 are receptor tyrosine kinase proteins that include a transmembrane domain. Tie1 and Tie2 are present on endothelial cells. This disclosure describes agents, such as antibodies, that bind to Tie1, Tie2, and Ang, including ones that inhibit endothelial cell activity and angiogenesis. The agents can be used to treat angiogenesis-associated disorders.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.11/199,739, filed Aug. 9, 2005, which is a continuation-in-part of U.S.application Ser. No. 11/049,536, filed Feb. 2, 2005, which is acontinuation-in-part of U.S. application Ser. No. 10/916,840, filed Aug.12, 2004, which claims priority to U.S. application Ser. No. 60/494,713,filed on Aug. 12, 2003. This application is also a continuation-in-partof PCT/US2004/026116, filed Aug. 12, 2004, which claims priority to U.S.Application Ser. No. 60/494,713, filed on Aug. 12, 2003. The contents ofeach of the foregoing applications are hereby incorporated by referencein their entirety. This application incorporates by reference ASCII textfile identified by the name 10280-135001.txt, containing 669 KB of data,and created on Oct. 24, 2005, filed in computer-readable format (CRF)and encoded on the CD-ROM.

BACKGROUND

The oxygen and nutrients supplied by the blood vessels are crucial fortissue development and function. Indeed, the cardiovascular system isthe first organ system to develop in embryos. During organogenesis andthe development of tissues or tumors, the proximity of the growing cellsto the circulatory system is ensured by the coordinated growth of bloodvessels and organ parenchyma. It may be possible to prevent or treatdiseases by modulating blood vessel development or angiogenesis.

Blood vessels are composed of an inner layer of endothelial cells and anouter layer of pericytes or smooth muscle cells. The first tubularstructures are formed by endothelial cells that subsequently recruitpericytes and smooth muscle cells to ensheath them. The de novoformation of blood vessels from a dispersed population of mesodermallyderived endothelial precursor cells is termed vasculogenesis. Thisprimitive network undergoes successive morphogenetic events includingsprouting, splitting, and remodeling to generate the hierarchicalvascular network from large to branched small vessels. These successivemorphogenetic events are collectively called angiogenesis. Previousstudies have identified a number of endothelial cell specific receptortyrosine kinases (RTKs) and their cognate ligands, which mediate thevasculogenic and angiogenic development of blood vessels. Members of thevascular endothelial growth factor (VEGF) family and their receptorsfunction during the formation of the initial embryonic vascular plexus,whereas angiopoietins (Angs) and their receptor, Tie2, as well asephrins and their Eph receptors are implicated in the subsequentremodeling processes. See, e.g., Jones et al. (2001) Nat. Rev. Molec.Cell Biol. 2:257 for a review of receptors involved in angiogenic andlymphangiogenic responses.

Tie1 and Tie2 are RTKs that are expressed almost exclusively inendothelial cells and hematopoietic precursor cells. These two receptorsare required for the normal development of vascular structures duringembryogenesis. The two Tie receptors form a RTK subfamily since, unlikeother RTK family members, they include extracellular EGF-homologydomains. See, e.g., Partanen (1992) Mol. Cell Biol. 12:1698 and WO93/14124. Targeted disruption of the Tie1 gene in mice results in alethal phenotype characterized by extensive hemorrhage and defectivemicrovessel integrity. See, e.g., Puri et al. (1995) EMBO J. 14:5884.Tie2 null embryos have defects in vascular remodeling and maturation,resulting from improper recruitment of periendothelial supporting cells.Angiopoietins (Ang, e.g., Ang1, Ang2, Ang3, and Ang4) are proteins thatinteract with Tie2.

SUMMARY

In one aspect, the invention features a method of modulating Tie complexformation, or interactions between Tie complex components, in a subject.The method includes administering, to a subject, an agent that binds toTie1. For example, the agent promotes Tie1 self-association (e.g.,homodimerization) or antagonizes an association between at least two ofthe following: Tie1, Tie2, and an angiopoietin (Ang; such as Ang1, Ang2,Ang3, or Ang4). In one embodiment, the agent antagonizes formation of aheteromeric complex of Tie1, Tie2, and Ang. In another embodiment, thebinding of the agent can antagonize the association between Tie1 andTie2, between Tie1 and Ang, or between Tie2 and Ang.

In one embodiment, the agent binds to Tie1. In one embodiment, the agentantagonizes formation of a heteromeric complex of Tie1, Tie2, and Ang.In another embodiment, the binding of the agent can antagonize theassociation between Tie1 and Tie2, between Tie1 and Ang, or between Tie2and Ang. In another embodiment, the agent enhances Tie1self-association, e.g., homodimerization, and thereby associates Tie1with Tie1 and prevents association of Tie1 with Tie2 and/or Ang. Theagent can include at least two valencies for binding to Tie1. In oneembodiment, the agent increases phosphorylation of Tie1, e.g., Tie1autophosphorylation. This increase can, but need not, depend on Tie1self-association.

In one embodiment, the agent includes a protein, such as an antibody,that binds to the extracellular domain of human Tie1. For example, theantibody can be one or more of the following: human, humanized,non-immunogenic, isolated, monoclonal, and recombinant. In oneembodiment, the antibody can bind to the first Ig-like C2-type domain(Ig 1) or to the second Ig-like C2-type domain (Ig 2) of Tie1. In oneembodiment, the antibody binds to an EGF-like domain of Tie1 (e.g.,first, second, or third EGF-like domain). In one embodiment, theantibody binds to the fibronectin type III repeats region of Tie1. Inone embodiment, the antibody binds to amino acid residues 24-124,74-174, 124-224, 174-274, 224-324, 274-374, 324-424, 374-474, 424-524,474-574, 524-624, 574-674, 624-724, 674-759, or 724-759 of SEQ ID NO:2.

In one embodiment, the agent includes a protein that binds to a Tie1ectodomain and includes a heavy chain (HC) immunoglobulin variabledomain sequence and a light chain (LC) immunoglobulin variable domainsequence. The protein can further include one or more of the followingproperties: (1) at least one of the variable domain sequences includesat least one CDR of the E3 or E3b antibody (e.g., one, two, or threeCDRs of the E3 or E3b antibody); (2) at least one of the variable domainsequences includes CDR sequences at least 85% identical, in sum, to theCDRs of the corresponding variable domain of the E3 or E3b antibody, (3)at least one of the variable domains is at least 85% identical to thecorresponding immunoglobulin variable domains of the E3 or E3b antibody,and (4) the protein competes with E3 or E3b for binding to Tie1 or bindsto an epitope that overlaps the epitope bound by E3 or E3b on Tie1.Example of antibodies that include an antigen binding site that competeswith E3 for binding to Tie1 include M0044B08, M0056G08, M0045B03,M0053F04, M0055E10, M0060H01, M0054H10, M0058F03, and relatedantibodies.

In one embodiment, the agent includes the HC and/or LC variable domainof the E3 or E3b antibody, or a sequence at least 70, 80, 85, 90, 95,98, 99% identical to the HC and/or LC variable domains of the E3 or E3bantibody. In one embodiment, the amino acid sequences of the HC variabledomain sequence include CDR1, CDR2, and CDR3 sequences from the E3 orE3b clone and the LC variable domain sequence includes CDR1, CDR2, andCDR3 sequences from the E3 or E3b clone. In one embodiment, the agentcomprises the E3 or E3b antibody. The LC variable domain sequence caninclude SEQ ID NO:116. The HC variable domain sequence can include SEQID NO:114. In one embodiment, the HC and LC framework regions are human.In one embodiment, that agent includes SEQ ID NO:723 and SEQ ID NO:724.

In one embodiment, the agent binds to Tie2. In one embodiment, the agentantagonizes formation of a heteromeric complex of Tie1, Tie2, and Ang.In another embodiment, the binding of the agent can antagonize theassociation between Tie1 and Tie2, between Tie1 and Ang, or between Tie2and Ang. In another embodiment, the agent enhances Tie2self-association, e.g., homodimerization, and, thereby associates Tie2with Tie2 and prevents association of Tie2 with Tie1 and/or Ang. In oneembodiment, the agent includes a protein, e.g., an antibody that bindsto the extracellular domain of human Tie2. For example, the antibody canbe one or more of the following: human, humanized, non-immunogenic,isolated, monoclonal, and recombinant. In one embodiment, the antibodycan bind to the first Ig-like C2-type domain (Ig 1) or to the secondIg-like C2-type domain (Ig 2) of Tie2. In one embodiment, the antibodybinds to an EGF-like domain of Tie2 (e.g., first, second, or thirdEGF-like domain). In one embodiment, the antibody binds to thefibronectin type III repeats region of Tie2. In one embodiment, theantibody binds to amino acid residues 19-119, 69-169, 119-229, 169-269,229-329, 269-369, 329-429, 369-469, 429-529, 469-569, 529-629, 569-669,629-729, 669-745, 729-745 of SEQ ID NO:162.

In one embodiment, the agent binds to Ang (e.g., Ang1, Ang2, Ang3, orAng4). In one embodiment, the agent antagonizes formation of aheteromeric complex of Tie1, Tie2, and Ang. In another embodiment, thebinding of the agent can antagonize the association between Tie1 andTie2, between Tie1 and Ang, or between Tie2 and Ang. In one embodiment,the agent includes a protein, e.g., an antibody that binds to Ang. Forexample, the antibody can be one or more of the following: human,humanized, non-immunogenic, isolated, monoclonal, and recombinant. Inone embodiment, the antibody binds to the N-terminal domain of Ang1(e.g., the N-terminal 50 amino acids of Ang1). In one embodiment, theantibody binds to the coiled-coil domain of Ang1. In one embodiment, theantibody binds to the fibrinogen-like domain of Ang1. In one embodiment,the antibody binds to amino acid residues 1-100, 50-150, 100-200,150-250, 200-300, 250-350, 300-400, 350-450, 400-497, or 450-497 of SEQID NO:163.

In one embodiment, the agent includes a protein that contains a heavychain (HC) immunoglobulin variable domain sequence and a light chain(LC) immunoglobulin variable domain sequence. In one embodiment, the HCand LC framework regions are human. In one embodiment, the agent alsoincludes an Fc domain. In one embodiment, the agent includes theconstant domains of a human IgG1, IgG2, IgG3, or IgG4. In oneembodiment, the constant domains of the heavy chain are f allotype,(a,z) allotype, or any other allotype.

In one embodiment, the agent is administered in an amount effective todecrease vascular development or angiogenesis. In one embodiment, thesubject has an angiogenesis-related disorder. In other embodiments, thesubject has for example: a neoplastic disorder, metastatic cancer, anangiogenesis-dependent cancer or tumor, an inflammatory disorder,rheumatoid arthritis, or psoriasis. In one embodiment, the protein isdelivered systemically.

In another embodiment, the protein is administered in an amounteffective to reduce one or more of the following activities: sprouting,splitting, remodeling of blood vessels, vasculogenesis, and tubuleformation. The method can include other features described herein.

In one aspect, the invention includes a method of decreasing orinhibiting endothelial cell activity in the subject, the method includesadministering an agent that decreases or inhibits Tie complex formationin an amount effective to decrease or inhibit endothelial cell activityin the subject. The method can include other features described herein.

In one aspect, the invention includes a method of decreasing endothelialcell activity by administering an agent that causes Tie1phosphorylation. In one embodiment, the phosphorylation decreasesendothelial cell differentiation, e.g., sprouting, splitting, and tubeformation.

In another aspect, the invention includes a method of decreasingendothelial cell activity, the method by administering an agent thatactivates a signaling pathway. In one embodiment, the signaling pathwaydecreases endothelial cell differentiation, e.g., sprouting, splitting,and tube formation. For example, the agent increases Tie1autophosphorylation. The method can include other features describedherein.

In one aspect, the invention includes an antibody for modulating Tiecomplex formation in a subject, wherein the antibody antagonizes anassociation between at least two of the following: Tie1, Tie2, and anangiopoietin (Ang). In one embodiment, the antibody binds to a Tiecomplex component or to one or more of Tie1, Tie2, and an Ang. In oneembodiment, the antibody antagonizes formation of a heteromeric complexof Tie1, Tie2, and Ang. In another embodiment, the antibody canantagonize the association between Tie1 and Tie2, between Tie1 and Ang,or between Tie2 and Ang.

In one embodiment, the antibody binds to Tie1. In one embodiment, theantibody antagonizes formation of a heteromeric complex of Tie1, Tie2,and Ang. In another embodiment, the binding of the antibody canantagonize the association between Tie1 and Tie2, between Tie1 and Ang,or between Tie2 and Ang. In another embodiment, the antibody enhancesTie1 self-association, e.g., homodimerization, and thereby associatesTie1 with Tie1 and prevents association of Tie1 with Tie2 or Ang. Inanother embodiment, the antibody increases Tie1 phosphorylation and/orprevents association of Tie1 with Tie2 or Ang. In one embodiment, theantibody includes an antibody that binds to the extracellular domain ofhuman Tie1. For example, the antibody can be one or more of thefollowing: human, humanized, non-immunogenic, isolated, monoclonal, andrecombinant. In one embodiment, the antibody can bind to the firstIg-like C2-type domain (Ig 1) or to the second Ig-like C2-type domain(Ig 2) of Tie1. In one embodiment, the antibody binds to an EGF-likedomain of Tie1 (e.g., first, second, or third EGF-like domain). In oneembodiment, the antibody binds to the fibronectin type III repeatsregion of Tie1. In one embodiment, the antibody binds to amino acidresidues 24-124, 74-174, 124-224, 174-274, 224-324, 274-374, 324-424,374-474, 424-524, 474-574, 524-624, 574-674, 624-724, 674-759, or724-759 of SEQ ID NO:2.

In one embodiment, the antibody binds to a Tie1 ectodomain and includesa heavy chain (HC) immunoglobulin variable domain sequence and a lightchain (LC) immunoglobulin variable domain sequence, the protein furtherincludes one or more of the following properties: (1) at least one ofthe variable domain sequences includes at least one CDR of the E3 or E3bantibody; (2) at least one of the variable domain sequences includes CDRsequences at least 85% identical, in sum, to the CDRs of thecorresponding variable domain of the E3 or E3b antibody; (3) at leastone of the variable domains is at least 85% identical to thecorresponding immunoglobulin variable domains of the E3 or E3b antibody,and (4) the protein competes with E3 or E3b for binding to Tie1 or bindsto an epitope that overlaps the epitope bound by E3 or E3b on Tie1. Forexample, the antibody is at least bivalent, e.g., with at least twoantigen binding sites that bind to Tie1. In one embodiment, the antibodycomprises the E3, E3b (e.g., DX-2220), or DX-2240.

In one embodiment, the antibody includes one or more variable domainsfrom the E3 or E3b antibody or a variable domain sequence that is atleast 70, 75, 80, 85, 90, 95, 98, or 995 identical to such a variabledomain. In one embodiment, the amino acid sequences of the HC variabledomain sequence include CDR1, CDR2, and CDR3 sequences from the E3 orE3b clone, and the LC variable domain sequence includes CDR1, CDR2, andCDR3 sequences from the E3 or E3b clone. In one embodiment, the LCvariable domain sequence includes SEQ ID NO:116. In one embodiment, theHC variable domain sequence includes SEQ ID NO:114. In one embodiment,the HC and LC framework regions are human.

In one embodiment, the antibody binds to Tie2. In one embodiment, theantibody antagonizes formation of a heteromeric complex of Tie1, Tie2,and Ang. In another embodiment, the binding of the antibody canantagonize the association between Tie1 and Tie2, between Tie1 and Ang,or between Tie2 and Ang. In another embodiment, the antibody enhancesTie2 self-association, e.g., homodimerization, and thereby associatesTie2 with Tie2 and prevents association of Tie2 with Tie1 or Ang. In oneembodiment, the antibody causes Tie1 phosphorylation. In one embodiment,the antibody prevents association of Tie1 with Tie2 or Ang. In oneembodiment, the antibody includes an antibody that binds to theextracellular domain of human Tie2. The antibody may have one or more ofthese properties, e.g., the antibody may cause Tie1 phosphorylation andprevent association of Tie1 with Tie2 or Ang, etc.

For example, the antibody can be one or more of the following: human,humanized, non-immunogenic, isolated, monoclonal, and recombinant. Inone embodiment, the antibody can bind to the first Ig-like C2-typedomain (Ig 1) or to the second Ig-like C2-type domain (Ig 2) of Tie2. Inone embodiment, the antibody binds to an EGF-like domain of Tie2 (e.g.,first, second, or third EGF-like domain). In one embodiment, theantibody binds to the fibronectin type III repeats region of Tie2. Inone embodiment, the antibody binds to amino acid residues 19-119,69-169, 119-229, 169-269, 229-329, 269-369, 329-429, 369-469, 429-529,469-569, 529-629, 569-669, 629-729, 669-745, 729-745 of SEQ ID NO:162.

In one embodiment, the antibody binds to Ang. In one embodiment, theantibody antagonizes formation of a heteromeric complex of Tie1, Tie2,and Ang. In another embodiment, the binding of the antibody canantagonize the association between Tie1 and Tie2, between Tie1 and Ang,or between Tie2 and Ang. For example, the antibody can be one or more ofthe following: human, humanized, non-immunogenic, isolated, monoclonal,and recombinant. In one embodiment, the antibody binds to the N-terminaldomain of Ang1 (i.e., the N-terminal 50 amino acids of Ang1). In oneembodiment, the antibody binds to the coiled-coil domain of Ang1. In oneembodiment, the antibody binds to the fibrinogen-like domain of Ang1. Inone embodiment, the antibody binds to amino acid residues 1-100, 50-150,100-200, 150-250, 200-300, 250-350, 300-400, 350-450, 400-497, or450-497 of SEQ ID NO:163.

In one embodiment, the antibody includes a heavy chain (HC)immunoglobulin variable domain sequence and a light chain (LC)immunoglobulin variable domain sequence.

In one embodiment, the HC and LC framework regions are human. In oneembodiment, the antibody also includes an Fe domain. In one embodiment,the antibody includes the constant domains of a human IgG1, IgG2, IgG3,or IgG4.

In one embodiment, the antibody is administered in an amount effectiveto decrease vascular development and angiogenesis. In one embodiment,the antibody is delivered systemically. In one embodiment, antibody isadministered in an amount effective to reduce one or more of thefollowing activities: sprouting, splitting, remodeling of blood vessels,vasculogenesis, and tubule formation.

In one aspect, the invention includes an isolated protein that includesone or more variable domains of an antibody described herein.

In one aspect, the invention includes a nucleic acid that includes acoding sequence that encodes a polypeptide that includes a variabledomain of an antibody described herein.

In one aspect, the invention includes a pharmaceutical composition thatincludes an antibody described herein. The composition and antibody caninclude other features described herein.

In one aspect, the invention includes an antibody described herein fortreatment of an angiogenesis-related disorder. The antibody andtreatment can include other features described herein.

In one aspect, the invention includes an antibody described herein forthe manufacture of a medicament for treating an angiogenesis-relateddisorder. The medicament and antibody can include other featuresdescribed herein.

In one aspect, the invention includes a method of providing a firsttherapy that includes administering a first agent in combination with asecond therapy, e.g., an anti-cancer therapy. The first agent is anagent that decreases Tie complex formation or an agent that increasesTie1 homodimerization. For example, the first agent is a Tie1 bindingprotein. In one embodiment, the second therapy includes radiationtherapy or surgery. In one embodiment, the second therapy includesadministering a second agent. For example, the second agent antagonizesor decreases Tie complex formation or increases Tie1 homodimerization.In one embodiment, the second agent is an agent that antagonizessignaling through a VEGF pathway, e.g., a VEGF antagonist antibody,e.g., bevacizumab; VEGF-Receptor tyrosine kinase inhibitor, or anotheragent that antagonizes VEGF pathway signalling. See also “CombinationTherapies” below.

In another aspect, the invention includes a composition that includes anagent that decreases Tie complex formation and an anti-cancer agent. Forexample, the anti-cancer agent can be a second agent that antagonizesTie complex formation or a second agent that antagonizes a VEGF pathway.

In one aspect, the invention features an antibody that decreasesendothelial cell activity by causing Tie1 phosphorylation. For example,the antibody may decrease endothelial cell differentiation, e.g.,sprouting, splitting, and tube formation.

In one aspect, the invention features a protein (e.g., an isolatedprotein) that includes a heavy chain immunoglobulin variable domainsequence and a light chain immunoglobulin variable domain sequence andbinds to Tie1 ectodomain. The binding protein binds to Tie1 ectodomain.For example, the protein binds with an affinity K_(D) of less than 10⁻⁸M, 5·10⁻⁹ M, 10⁻⁹ M, 10⁻¹⁰ M, 10⁻¹¹ M, or 10⁻¹² M.

In one embodiment, one or more of the CDRs of the heavy and/or lightchain variable domain sequence are human, primate, non-rodent (e.g.,non-mouse or non-rat), or synthetic. In one embodiment, one or more ofthe framework regions of the heavy and/or light chain variable domainsequence are human, primate, or non-rodent (e.g., non-mouse or non-rat).

In one embodiment, the heavy chain variable domain sequence includes oneor more of the following properties:

i) a HC CDR1 that includes an amino acid sequence as follows:

(AGSR)-Y-(GVK)-M-(GSVF), (SEQ ID NO:117)

(AGSIMRH)-Y-(GVMK)-M-(GSVMFH) (SEQ ID NO:118), or

(AGSIMRNH)-Y-(AGTVMKPQ)-M-(AGSTVMYWFKH) (SEQ ID NO:119);

ii) a HC CDR2 that includes an amino acid sequence as follows:

X-I-Y-P-S-G-G-X-T-X-Y-A-D-S-V-K-G (SEQ ID NO:120), wherein X is anyamino acid,

(GSV)-I-(SY)-P-S-G-G-(WQ)-T-(GY) (SEQ ID NO:121),

(GSV)-I-(SY)-P-S-G-G-(WNQ)-T-(GY) (SEQ ID NO:160)

(GSV)-I-(SY)-P-S-G-G-(WQ)-T-(GY)-Y-A-D-S-V-K-G (SEQ ID NO:122),

(GSVW)-I-(SY)-P-S-G-G-(AGVMYWPQH)-T-(AGSTLVMYFKH) (SEQ ID NO:123), or

X-I-Y-P-S-G-G-(WPS)-T-(YVH)-Y-A-D (SEQ ID NO: 722), wherein X is anyamino acid;

iii) a HC CDR3 that includes an amino acid sequence as follows:

V-(four or five residues)-F-D-(I/Y) (SEQ ID NO:124),

G-Y-G-P-I-A-P-G-L-D-Y (SEQ ID NO:125),

(GV)-N-Y-Y-(GYD)-S-(SD)-G-Y-G-P-I-A-P-G-L-D-Y (SEQ ID NO:126),

(GVD)-(AGLN)-(LYR)-(GSTLYH)-(GYD)-(AGSYFP)-(SFD)-(AGYD)-(IY)-(GFD)-(YDP)-(IP)-A-P-G-L-D-Y(SEQ ID NO:127),

A-P-R-G-Y-S-Y-G-Y-Y-Y (SEQ ID NO:157)

VNYYDSSGYGPIAPGLDY (SEQ ID NO:128), or

G-X-X-G-(AY)-F-D-(YI) (SEQ ID NO:705), wherein X is any amino acid.

In one embodiment, the light chain variable domain sequence includes oneor more of the following properties:

i) a LC CDR1 that includes an amino acid sequence as follows:

R-A-S-Q-S-(IV)-S-(SR)-X1-Y-L-(AN) (SEQ ID NO:129),

R-A-S-Q-S-(IV)-S-S-(YS)-L-(ALN) (SEQ ID NO:706),

T-G-T-(SN)-S-D-V-G-(GS)-Y (SEQ ID NO:707),

(SGQ)-(GS)-(DS)-(NS)-(IL)-(GR)-S-(YKN)-(YS)-(VA) (SEQ ID NO:708),

R-A-S-Q-S-V-S-S-X-L (SEQ ID NO:130),

R-A-S-Q-S-(IV)-S-(SR)-(SY)-(LY)-(ALN) (SEQ ID NO:131), or

R-A-S-(REQ)-(GSTRN)-(IV)-(GSTIRN)-(STIRH)-X1-(SYWNH)-(LV)-(ASN) (SEQ IDNO:132), wherein X1 can be serine or absent;

ii) a LC CDR2 that includes an amino acid sequence as follows:

X-A-S-X-R-A-T (SEQ ID NO:133), wherein X can be any amino acid,

(AGD)-A-S-(STN)-R-A-T (SEQ ID NO:134),

(DG)-(AV)-S-N-(RL)-(AP)-ST) (SEQ ID NO:709),

(AGD)-A-S-(STN)-(LR)-(AEQ)-(ST) (SEQ ID NO:135), or

(AGTKDEH)-A-S-(STN)-(LR)-(AVEQ)-(ST) (SEQ ID NO:136); and

iii) a LC CDR3 that includes an amino acid sequence as follows:

Q-Q-(SYFR)-(GSYN)-S-(STYW)-(RP)-(LWRH)-(TIY) (SEQ ID NO:161),

Q-Q-(SYFR)-(GSYN)-S-(STYW)-(RP)-(LWR)-(TIY)-T (SEQ ID NO:137),

(LQ)-Q-(SYFR)-(GSYN)-(SKN)-(STYW)-(RP)-(LWR)-(TIY)-T (SEQ ID NO:138),

Q-Q-X-S-(SN)-(WS)-P-X-T-F (SEQ ID NO:710), wherein X is any amino acid,

Y-(TG)-(SG)-S-(PGS)-(TN)-X-(VT) (SEQ ID NO:711), wherein X is any aminoacid,

Q-Q-(YR)-(GS)-S-(SW)-P-R-X1-T (SEQ ID NO:139), wherein X1 is any aminoacid or absent,

Q-Q-F-N-S-Y-P-H (SEQ ID NO:158)

(LQ)-(LQ)-(SYFRD)-(GSYN)-(STRKN)-(STYWFXRP)-(ILMWRH)-(TIY)-(TI) (SEQ IDNO:140), or

(LQ)-(LRQ)-(SYFRD)-(GSYN)-(ASTRKN)-(STYWF)-(SVRP)-(STILMWRH)-(TIY)-(STI)(SEQ ID NO:141).

In one embodiment, the light chain variable domain sequence includes oneor more of the following properties:

i) a LC CDR1 that includes an amino acid sequence as follows:

S-X-(ND)-(IV)-(AG)-X1-X2-X3 (SEQ ID NO:142), or

T-(GR)-(ST)-S-X5-(ND)-(IV)-(AG)-X1-X2-X3-Y-X4-S (SEQ ID NO:143), whereinX1 is any amino acid (e.g., G or R), X2 is any amino acid (e.g., Y orN), X3 is any amino acid (e.g., F, N, or K), X4 is any amino acid (e.g.,aliphatic, e.g., V or A);

ii) a LC CDR2 that includes an amino acid sequence as follows:

(DE)-V-N-N-R-P-S (SEQ ID NO:144)

(DE)-(VD)-(STDN)-(YRDN)-R-P-S (SEQ ID NO:145);

iii) a LC CDR3 that includes an amino acid sequence as follows:

(SQ)-S-(SY)-(ASID)-(GSR)-(ST)-(STRN)-(STYR)-(ATLY)-(SVWQ) (SEQ IDNO:146).

In one embodiment, the HC CDR2 includes an amino acid sequence asfollows:(GSVW)-I-(SY)-P-SG-G-(AGVMYWPQH)-T-(AGSTLVMYFKH)-Y-(AT)-D-S-V-K-G (SEQID NO:147) or (GSV)-I-(SY)-P-SG-G-(WQ)-T-(GY)-Y-(AT)-D-S-V-K-G (SEQ IDNO:148).

In one embodiment, the protein includes HC CDR1 and HC CDR2 sequencesthat are related to the corresponding CDR sequences of p-F3, E3 or E3b.For example, the protein includes the sequence MYGM (SEQ ID NO:149), ata position corresponding to HC CDR1. The sequence can be followed by asmall amino acid, e.g., glycine, alanine, valine, or serine. In anotherexample, the protein the sequence VISPSGGX₁TX₂YADSAVKG (SEQ ID NO:150),at a position corresponding to HC CDR2. For example, X₁ can be ahydrophilic amino acid, e.g., glutamine or asparagine. For example, X₂can be a small amino acid, e.g., glycine, alanine, valine, or serine.

In one embodiment, the heavy chain variable domain sequence can have oneor more of the following features: the amino acid residue at Kabatposition 31 is A, H, K, N, Q, R, S, or T, e.g., H, N, R, or S; the aminoacid residue at Kabat position 32 is Y; the amino acid residue at Kabatposition 33 is G, K, P, R, or V, e.g., K or V; the amino acid residue atKabat position 34 is M; the amino acid residue at Kabat position 35 isA, G, H, I, L, M, S, or V, e.g., G, H, M, or V; the amino acid residueat Kabat position 50 is G, R, S, or V, e.g., S or V; the amino acidresidue at Kabat position 51 is I; the amino acid residue at Kabatposition 52 is S or Y, e.g., Y; the amino acid residue at Kabat position52a is P or S, e.g., P; the amino acid residue at Kabat position 53 isS; the amino acid residue at Kabat position 54 is G; the amino acidresidue at Kabat position 55 is G; the amino acid residue at Kabatposition 56 is A, F, H, I, Q, W, or Y, e.g., A, W or Y; the amino acidresidue at Kabat position 57 is T; the amino acid residue at Kabatposition 58 is R, S, T, or Y, e.g., Y. In one embodiment, the length ofCDR3 is between 8-18 amino acids, e.g., between 8-12, 8-10, or 15-17amino acids.

In one embodiment, two or three of the CDRs of the HC variable domainsequence match motifs that also match a HC variable domain of anantibody described herein. Similarly, in one embodiment, two or three ofthe CDRs of the LC variable domain sequence match motifs that also matcha LC variable domain of an antibody described herein. In still anotherembodiment, the matched motifs for the CDRs are based on a HC and a LCthat are paired in an antibody described herein.

In one embodiment, the H1 and H2 hypervariable loops have the samecanonical structure as an antibody described herein. In one embodiment,the L1 and L2 hypervariable loops have the same canonical structure asan antibody described herein.

In one embodiment, the HC CDR1 amino acid sequences have a length of atleast 5 amino acids of which at least 3, 4, or 5 amino acids areidentical to the CDR1 sequence of the HC of clone E3, E3b, G2, p-A1,p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2,s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, or anotherantibody described herein. In one embodiment, the HC CDR2 amino acidsequences have a length of at least 15, 16, or 17 amino acids of whichat least 10, 12, 14, 15, 16, or 17 amino acids are identical to the CDR2sequence of the HC of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6,p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C1, s-C2,s-C7, s-D11, s-G10, s-H4, or another antibody described herein. In oneembodiment, the HC CDR2 amino acid sequences have a length of at least17 amino acids of which at least 14, 15, 16, or 17 amino acids areidentical to the CDR2 sequence of the HC of clone E3, E3b, G2, p-A1,p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2,s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, or anotherantibody described herein. In one embodiment, the HC CDR3 amino acidsequences have a length of at least of at least 7 or 8 amino acids ofwhich at least 5, 6, 7, or 8 amino acids are identical to the CDR3sequence of the HC of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6,p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2,s-C7, s-D11, s-E11, s-G10, s-H4, or another antibody described herein.

In one embodiment, two or three of the CDRs of the HC variable domainsequence match motifs described herein such that the motifs are a set ofmotifs that match a HC variable domain of a clone described herein,e.g., E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4,p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11,s-G10, s-H4, or another antibody described herein. For example, theprotein may include SEQ ID NO:118 and SEQ ID NO:160, e.g., motifs thatmatch the E3 HC variable domain.

In one embodiment, the LC CDR1 amino acid sequences have a length of atleast 10, 11, or 12 amino acids of which at least 7, 8, 9, 10, or 11amino acids are identical to the CDR1 sequence of the LC of clone E3,E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10,s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, oranother antibody described herein. In one embodiment, the LC CDR2 aminoacid sequences have a length of at least 6 or 7 amino acids of which atleast 5, 6, or 7 amino acids are identical to the CDR2 sequence of theLC of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3,p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11,s-E11, s-G10, s-H4, or another antibody described herein. In oneembodiment, the LC CDR3 amino acid sequences have a length of at leastof at least 8, 9, or 10 amino acids of which at least 7, 8, 9, or 10amino acids are identical to the CDR3 sequence of the LC of clone E3,E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10,s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, oranother antibody described herein.

In one embodiment, two or three of the CDRs of the LC variable domainsequence match motifs described herein such that the motifs are a set ofmotifs that match a LC variable domain of a clone described herein,e.g., E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4,p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11,s-G10, s-H4, or another antibody described herein. For example, theprotein may include SEQ ID NO:132, SEQ ID NO:136, and SEQ ID NO:161,e.g., motifs that match the E3 LC variable domain.

In one embodiment, the amino acid sequence of the HC variable domainsequence is at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or 100%identical to the amino acid sequence of the HC variable domain of cloneE3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3,s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10,s-H4, or another antibody described herein.

In one embodiment, the amino acid sequence of the LC variable domainsequence is at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or 100%identical to the amino acid sequence of the LC variable domain of cloneE3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3,s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10,s-H4, or another antibody described herein.

In one embodiment, the amino acid sequences of the HC and LC variabledomain sequences are at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or100% identical to the amino acid sequences of the HC and LC variabledomains of a clone selected from the group consisting of E3, E3b, G2,p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1,s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, and anyother antibody described herein.

In one embodiment, the amino acid sequences of one or more frameworkregions (e.g., FR1, FR2, FR3, and/or FR4) of the HC and/or LC variabledomain are at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or 100%identical to corresponding framework regions of the HC and LC variabledomains of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12,p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7,s-D11, s-E11, s-G10, s-H4, or another antibody described herein.

In one embodiment, the amino acid sequences of the HC and LC variabledomain sequences comprise a sequence encoded by a nucleic acid thathybridizes (e.g., under high stringency) to a nucleic acid encoding avariable domain of E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12,p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7,s-D11, s-E11, s-G 10, s-H4, or another antibody described herein.

In one embodiment, the light chain variable domain sequence is human ornon-immunogenic in a human. In one embodiment, the heavy chain variabledomain sequence is human or non-immunogenic in a human.

The protein can bind to cells that express Tie1, e.g., endothelialcells. In one embodiment, the protein does not substantially bind (e.g.,does not detectably bind) to platelets (e.g., resting and/or activatedplatelets).

In one embodiment, the protein inhibits tube formation by HUVECs invitro. For example, the E3 antibody inhibits tube formation by HUVECs invitro (e.g., under conditions described in Example 18). In oneembodiment, the protein inhibits angiogenesis in an in vivo MATRIGEL™plug assay. For example, the E3 antibody can inhibit angiogenesis in anexemplary assay (see, e.g., an exemplary assay described in Example 21).

In one embodiment, the protein recognizes melanoma-associated structuresin a histological section, e.g., not only melanoma tissue, but antigenin surrounding structures. In one embodiment, the protein does not stainblood vessels in normal skin in a histological section.

In one embodiment, the protein specifically binds to Tie1, e.g., itbinds with at least a 10, 50, 100, 10³, or 10⁴ fold preference for Tie1relative to another human protein, e.g., Tie2, a natural protein otherthan Tie1 that has a Ig-like domain, an EGF-like domain, or fibronectinType III repeat, or human serum albumin. In one embodiment, the proteinbinds to a domain of Tie1 described herein.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that modulates activity of Tie1, e.g., the Tie1 receptor. Forexample, the protein is not naturally occurring. In one embodiment, theprotein includes a HC and LC immunoglobulin variable domain sequence. Inone embodiment, one or more of the CDRs of the heavy and/or light chainvariable domain sequence are human, primate, non-rodent (e.g., non-mouseor non-rat), or synthetic. In one embodiment, one or more of theframework regions of the heavy and/or light chain variable domainsequence are human, primate, or non-rodent (e.g., non-mouse or non-rat).In another embodiment, the protein is substantially free of animmunoglobulin variable domain, e.g., the protein includes a peptidethat independently interacts with Tie1 or a polypeptide that does notinclude a immunoglobulin variable domain.

In one embodiment, the protein activates an activity of the Tie1protein, e.g., an activity in the Tie1/EpoR chimeric BaF3 cell assaydescribed in Example 2. A protein that activates in this assay canbehave as antagonists in other conditions, for example, in vivo.

In one embodiment, the protein includes the HC and LC immunoglobulinvariable domains of the E3, E3b, or other antibody, HC and/or LCimmunoglobulin variable domain sequences that are at least 70, 80, 85,90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% identical in the CDRregions to the respective CDRs of the E3, E3b or other antibodydescribed herein. In one embodiment, the protein competes with E3, E3b,or other antibody described herein for binding to Tie1 or binds to anepitope that overlaps an epitope that is recognized by E3, E3b, or otherantibody described herein, or that has at least one, two or threeresidues in common with an epitope that is recognized by E3, E3b, orother antibody described herein.

In one embodiment, the activating protein enables IL-3 dependent cellsthat express a chimeric receptor including the Tie1 extracellular domainand the EpoR intracellular domain to survive in the absence of IL-3.

In one embodiment, the protein can cause dimerization of Tie1. In oneembodiment, the protein can cause auto-phosphorylation of the RTK domainof Tie1.

In one embodiment, the protein synergizes with the E3 or E3b antibody toactivate an activity of Tie, e.g., in the Tie1/EpoR chimeric BaF3 cellassay. In one embodiment, the protein includes the HC and LCimmunoglobulin variable domains of the G2 or C7 antibody or domains thatare at least 70, 80, 85, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100%identical in the CDR regions. In one embodiment, the protein competeswith G2 or C7 for binding to Tie1 or binds to an epitope that overlapsan epitope that is recognized by G2 or C7 or that has at least one, twoor three residues in common with an epitope that is recognized by G2 orC7.

In another embodiment, the protein antagonizes an activity of the Tie1protein. For example, the protein can at least partially inhibit theability of the E3 or E3b antibody to agonize the Tie protein. In oneembodiment, the protein can at least partially inhibit the ability ofthe E3 or E3b antibody to enable IL-3 dependent cells that express achimeric receptor including the Tie1 extracellular domain and the EpoRintracellular domain to survive in the absence of IL-3.

In one embodiment, the HC and LC immunoglobulin variable domainsequences of the protein include the amino acid sequences that are atleast 70, 80, 85, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100%identical to the amino acid sequences of respective immunoglobulinvariable domains of B2 or D11.

In one embodiment, the Tie1 binding protein includes the HC and LCimmunoglobulin variable domains of an antibody selected from the groupconsisting of: B2, D11, A2, A10, P-B1, P-B3, and P-C6 or immunoglobulindomains that are at least 70, 80, 85, 90, 91, 92, 93, 94, 95, 96, 97,98, 99, or 100% identical in the CDR regions to the CDR regions of therespective antibodies. For example, the protein binds with an affinityK_(D) of less than 10⁻⁸ M, 5·10⁻⁹ M, 10⁻⁹ M, 10⁻¹⁰ M, 10⁻¹¹ M, or 10⁻¹²M.

In one embodiment, the protein can at least partially inhibit theability of a naturally occurring Tie1 binding protein from interactingwith the Tie protein.

The protein can include other features described herein.

In another aspect, the invention features an antibody (e.g., an isolatedantibody) that binds to the Tie1 ectodomain, but does not substantiallybind to platelets, e.g., as detected by fluorescence activated cellsorting. For example, the antibody does not substantially bind toactivated platelets and/or resting platelets. In one embodiment, theantibody binds to endothelial cells. In one embodiment, the protein is amonoclonal antibody. The antibody can be provided in a preparation thatis free of other Tie1-binding antibodies that have other specificities,e.g., free of Tie1 binding antibodies that bind to platelets. Theantibody can include other features described herein.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that preferentially binds to a Tie1 protein in a conformationstabilized by the E3 or E3b antibody relative to an endogenous Tie1protein in an unstimulated state. In one embodiment, the proteinincludes immunoglobulin HC and LC domains. In another embodiment, theprotein includes a peptide (e.g., of length less than 30, 28, 25, 22,20, 18, 16, or 14 amino acids) that independently binds to Tie1. Forexample, the peptide can include one, two, or three disulfide bonds. Theprotein can include other features described herein.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that preferentially binds to a Tie1 protein in a dimericconformation relative to a monomeric Tie1 protein. In one embodiment,the protein includes immunoglobulin HC and LC domains. In anotherembodiment, the protein includes a peptide (e.g., of length less than30, 28, 25, 22, 20, 18, 16, or 14 amino acids) that independently bindsto Tie1. For example, the peptide can include one, two, or threedisulfide bonds. The protein can include other features describedherein.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that preferentially binds to a Tie2 protein in a conformationthat is biased against interaction with Ang or Tie1. In one embodiment,the protein includes immunoglobulin HC and LC domains. In anotherembodiment, the protein includes a peptide (e.g., of length less than30, 28, 25, 22, 20, 18, 16, or 14 amino acids) that independently bindsto Tie2. For example, the peptide can include one, two, or threedisulfide bonds. The protein can include other features describedherein. The invention also features nucleic acid aptamers that have oneor more of these properties.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that preferentially binds to an Ang protein, and modulates(e.g., inhibits) interaction with Tie1 and Tie2. In one embodiment, theprotein includes immunoglobulin HC and LC domains. In anotherembodiment, the protein includes a peptide (e.g., of length less than30, 28, 25, 22, 20, 18, 16, or 14 amino acids) that independently bindsto Ang. For example, the peptide can include one, two, or threedisulfide bonds. The protein can include other features describedherein. The invention also features nucleic acid aptamers that have oneor more of these properties.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that binds to an epitope of Tie1 ectodomain with a K_(D) ofless than 2×10⁻⁷ M. The epitope overlaps, is within, or includes anepitope bound by E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12,p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7,s-D11, s-E11, s-G10, s-H4, or another antibody described herein or thatincludes at least one, two, or three residues in common. For example,the protein binds with an affinity K_(D) of less than 10⁻⁸ M, 5·10⁻⁹ M,10⁻⁹ M, 10⁻¹⁰ M, 10⁻¹¹ M, or 10⁻¹² M. In one embodiment, the proteinincludes immunoglobulin HC and LC domains. In another embodiment, theprotein includes a peptide (e.g., of length less than 30, 28, 25, 22,20, 18, 16, or 14 amino acids) that independently binds to Tie1. Forexample, the peptide can include one, two, or three disulfide bonds. Theprotein can include other features described herein. The invention alsofeatures nucleic acid aptamers that have one or more of theseproperties.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that competitively inhibits binding of E3, E3b, G2, p-A1,p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2,s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, or anotherantibody described herein to a Tie1 ectodomain. In one embodiment, theprotein includes immunoglobulin HC and LC domains. In anotherembodiment, the protein includes a peptide (e.g., of length less than30, 28, 25, 22, 20, 18, 16, or 14 amino acids) that independently bindsto Tie1. For example, the peptide can include one, two, or threedisulfide bonds. The protein can include other features describedherein.

In another aspect, the invention features a protein (e.g., an isolatedprotein) that includes a heavy chain immunoglobulin variable domainsequence and a light chain immunoglobulin variable domain sequence andthat antagonizes an activity of the Tie1 ectodomain. In one embodiment,CDR1 of the light chain variable domain sequence includes: Q-S-X-S-S(SEQ ID NO:151) or R-A-S-Q-S-X-S-S-Y-L-A (SEQ ID NO:152), wherein X isany amino acid or optionally aliphatic, e.g., isoleucine or valine. Inone embodiment, CDR2 of the light chain variable domain sequenceincludes: A-S-X₁-R-X₂-T (SEQ ID NO:153) or D-A-S-X₁-R-X₂-T (SEQ IDNO:154), wherein X₁ is any amino acid or optionally a hydrophilic aminoacid, e.g., serine or asparagine, and X₂ is any amino acid or optionallyaliphatic or small aliphatic, e.g., alanine or valine. In oneembodiment, CDR3 of the light chain variable domain sequence includes:Q-R-S-X₂-W-P-R (SEQ ID NO:155) or X₁-Q-R-S-X₂-W-P-R-T (SEQ ID NO:156),wherein X₁ is any amino acid or optionally leucine or glutamine, and X₂is any amino acid or optionally lysine or serine.

In one embodiment, the protein competes with the B2 and/or D11 antibodyfor binding to Tie1 or competitively inhibits binding of B2 and/or D11to Tie1.

In one embodiment, the protein antagonizes a Tie1 activity that isstimulated by the E3 or E3b antibody. In one embodiment, the proteininhibits dimerization of Tie1. The protein can include other featuresdescribed herein.

In another aspect, the invention features an isolated, mono-specificprotein including a heavy chain immunoglobulin variable domain sequenceand a light chain immunoglobulin variable domain sequence, wherein theprotein binds to Tie1 ectodomain and includes a human or non-mouseconstant domain (e.g., a human IgG1, IgG2, IgG3, or IgG4 constantdomain). The protein can include other features described herein.

In another aspect, the invention features an isolated, human antibodythat binds to a Tie1 ectodomain. The protein can include other featuresdescribed herein.

In another aspect, the invention features an isolated antibody (e.g., anisolated antibody) that binds to a Tie1 ectodomain and contains lessthan 5, 4, 3, or 2 peptides (of between 6-9 amino acid length) that arenon-human in origin or less than 5, 4, 3, or 2 peptides that arepotential human T cell epitopes. In one embodiment, the antibodycontains no peptide (of 6-9 amino acid length) that is non-human inorigin or that is a potential human T cell epitope.

In one embodiment, the antibody is obtained by a method that includesdeimmunization. For example, the antibody is deimmunized, e.g.,completely deimmunized. The protein can include other features describedherein.

In another aspect, the invention features an isolated antibody thatbinds to a Tie1 ectodomain and that includes a modified Fc domain, e.g.,a modified human Fc domain. For example, antibodies may includemodifications, e.g., that alter Fc function. For example, the human IgG1constant region can be mutated at one or more residues, e.g., one ormore of residues 234 and 237, e.g., according to the number in U.S. Pat.No. 5,648,260. Other exemplary modifications include those described inU.S. Pat. No. 5,648,260. The protein can include other featuresdescribed herein.

In another aspect, the invention features an isolated protein that bindsto the Tie1 receptor with an affinity K_(D) of less than 10⁻⁷ M, 10⁻⁸ M,5·10⁻⁹ M, 10⁻⁹ M, 10⁻¹⁰ M, 10 ⁻¹¹ M, or 10⁻¹² M. The protein can includeother features described herein.

In another aspect, the invention features an isolated protein includinga heavy chain immunoglobulin variable domain sequence and a light chainimmunoglobulin variable domain sequence, wherein the protein binds toTie1 ectodomain and, for example, includes at least one or more CDRsthat are a non-primate CDR (e.g., a non-mouse or non-rabbit CDR) or asynthetic CDR. The protein can include other features described herein.

In another aspect, the invention features an isolated nucleic acidincluding a coding sequence that encodes a polypeptide including animmunoglobulin HC variable domain of an antigen binding protein thatbinds to Tie1. The nucleic acid or polypeptide can include one or moreother features described herein. The nucleic acid can include one ormore altered codons. In one embodiment, the nucleic acid includes SEQ IDNOs:725 and/or 726. Also featured is a mammalian expression vector thatincludes SEQ ID NOs:725 and/or 726.

In one embodiment, the nucleic acid further includes a second codingsequence that encodes a polypeptide including an immunoglobulin HCvariable domain, e.g., an HC domain described herein. In one embodiment,the nucleic acid further includes a promoter operably linked to thecoding sequence.

In another aspect, the invention features a nucleic acid that includesone or more coding sequence that encodes one or more polypeptide chainsthat collectively include an immunoglobulin HC or LC variable domain ofan antigen binding protein that binds to Tie1. In one embodiment, thenucleic acid segment encoding at least one of the variable domainshybridizes to a nucleic acid described herein, e.g., under stringentconditions (e.g., high stringency conditions), e.g., it hybridizes to aregion encoding a variable domain and is at least 80, 85, 90, 95, or 98%of the length of such a region. The nucleic acid can include otherfeatures described herein.

In another aspect, the invention features a host cell that contains afirst nucleic acid sequence encoding a polypeptide including a HCvariable domain of an antigen binding protein and a second nucleic acidsequence encoding a polypeptide including a LC variable domain of theantigen binding protein, wherein the antigen binding protein binds toTie1 with a K_(D) of less than 2×10⁻⁷ M. In one embodiment, the HC or LCvariable domain includes at least one human CDR. The antigen bindingprotein can include other features described herein.

In another aspect, the invention features a host cell that contains afirst nucleic acid encoding a polypeptide including a HC variable regionand a second nucleic acid encoding a polypeptide including a LC variableregion, wherein the HC and the LC variable regions each include at least70, 80, 85, 90, 92, 95, 97, 98, 99, or 100% identical to respectiveamino acid sequences of the HC and LC variable domains of a cloneselected from the group consisting of E3, E3b, G2, p-A1, p-A10, p-B1,p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9,s-C1, s-C2, s-C7, s-D11, s-E11, s-G10, and s-H4. The antigen bindingprotein can include other features described herein.

In another aspect, the invention features a pharmaceutical compositionincluding a protein described herein that interacts with Tie1 and apharmaceutically acceptable carrier.

In another aspect, the invention features a therapeutic compositionincluding a protein described herein that interacts with Tie1 whereinthe composition is sterile and suitable for administration to a subject.

In another aspect, the invention features a method that includes:providing a signal-dependent or signal-responsive cell that expresses achimeric receptor including the Tie1 extracellular domain and aheterologous intracellular sequence that can produce a signal;contacting a candidate compound to the cell; and evaluating a propertyof the cell that is dependent on the signal. In one embodiment, theintracellular sequence includes at least a region of an intracellularsequence of the EpoR protein. The method can be used, e.g., to evaluateactivity of a candidate compound, or a plurality of compounds.

In another aspect, the invention features a method that includes:providing an IL-3 dependent cell that expresses a chimeric receptorincluding the Tie1 extracellular domain and the EpoR intracellulardomain; contacting a candidate compound to the cell under conditions inwhich the concentration of IL-3 is not sufficient to sustain viabilityof the cell; and evaluating a property of the cell. The method can beused, e.g., to evaluate activity of a candidate compound, or a pluralityof compounds. In one embodiment, the property is viability. In oneembodiment, the evaluating includes an MTT assay. In one embodiment, themethod further includes administering the candidate compound to asubject. For example, the candidate compound includes a protein, e.g., aprotein that includes an immunoglobulin variable domain.

In another aspect, the invention features method of identifying acompound that modulates Tie1 activity. The method includes: providing aplurality of candidate compounds; and evaluating each compound of theplurality using a method described herein.

In another aspect, the invention features a culture cell that expressesa chimeric transmembrane protein including a region of the Tie1extracellular domain and a heterologous intracellular sequence. In oneembodiment, the intracellular sequence includes a region of the EpoRintracellular domain. In one embodiment, the cell requires IL-3 or Tie1for viability. For example, the cell is IL-3 dependent in the absence ofthe chimeric transmembrane protein, but is viable in the presence of theE3 or E3b antibody and the absence of IL-3.

In another aspect, the invention features a preparation that includesthe isolated mammalian cells (e.g., cells that expresses a chimerictransmembrane protein including a region of the Tie1 extracellulardomain and a heterologous intracellular sequence) and a Tie1-bindingprotein, wherein the Tie1-binding protein is necessary to sustainviability of the cells.

In another aspect, the invention features a kit including: aTie1-binding protein and a culture cell that expresses a chimerictransmembrane protein including a region of the Tie1 extracellulardomain and a heterologous intracellular sequence.

In another aspect, the invention features a method of evaluating acandidate compound. The method includes: providing a preparation thatincludes (i) a cell or membrane fraction that contains (a) an insolubleprotein that includes a region of the Tie1 extracellular domain and akinase domain and (b) ATP; (ii) a ligand that alters activity of thekinase domain; and (iii) the candidate compound; and evaluating thephosphorylation state of the insoluble protein.

In another aspect, the invention features a method of evaluating acandidate compound. The method includes: providing a preparation thatincludes (i) a cell or membrane fraction that includes a Tie1 protein ora transmembrane protein that includes at least a region of the Tie1extracellular domain and ATP; (ii) a ligand that causesautophosphorylation of Tie1 or the transmembrane protein; and (iii) thecandidate compound; and evaluating phosphorylation state of the Tie1protein.

In one embodiment, the ligand is an antibody. In one embodiment, theligand includes the HC and LC immunoglobulin variable domains of the E3or E3b antibody or domains that are at least 90% identical in the CDRregions. In one embodiment, the method further includes administeringthe candidate compound to a subject.

In another aspect, the invention features a method that includes:providing a preparation that includes (i) a cell or membrane fractionthat includes a transmembrane protein that includes at least a region ofthe Tie1 extracellular domain and ATP; and (ii) a ligand that causesautophosphorylation of Tie1 or the transmembrane protein; and evaluatingphosphorylation state of the transmembrane protein.

In another aspect, the invention features a method that includes:contacting a mammalian cell with a ligand that (i) can agonize Tie1autophosphorylation and/or (ii) can enable an IL-3 dependent cell thatexpresses a chimeric receptor including the Tie1 extracellular domainand the EpoR intracellular domain to remain viable under conditions inwhich the concentration of IL-3 is not sufficient to sustain viabilityof the cell; and evaluating the mammalian cell. In one embodiment, thecell expresses an endogenous Tie1 protein. In one embodiment, the cellis an endothelial cell. In one embodiment, the method further includescontacting the mammalian cell with a test compound, other than theligand. For example, the ligand is an antibody. For example, the ligandincludes the HC and LC immunoglobulin variable domains of the E3 or E3bantibody or domains that are at least 90% identical in the CDR regions.

In another aspect, the invention features a method that includes:contacting a mammalian cell or fraction thereof with an agent that canmodulate the activity of Tie1; and evaluating the mammalian cell orfraction thereof. In one embodiment, the agent is contacted to the cellwhile the cell is living, and the evaluating includes isolating afraction of the cell. In one embodiment, the agent is a protein, e.g.,an antibody or a peptide. In one embodiment, the agent includes the HCand LC immunoglobulin variable domains of the E3 or E3b antibody ordomains that are at least 90% identical in the CDR regions to the E3 orE3b antibody. In one embodiment, the agent includes the HC and LCimmunoglobulin variable domains of the B2 or D11 antibody or domainsthat are at least 90% identical in the CDR regions to the B2 or D11antibody. In one embodiment, the agent includes the HC and LCimmunoglobulin variable domains of the A2, A10, P-B1, P-B3, or P-C6antibody or domains that are at least 70, 80, 85, 90, 91, 92, 93, 94,95, 96, 97, 98, 99, or 100% identical% identical in the CDR regions tothe A2, A10, P-B1, P-B3, or P-C6 antibody. In one embodiment, the agentincludes the HC and LC immunoglobulin variable domains of the G2 or C7antibody or domains that are at least 90% identical in the CDR regionsto the G2, or C7 antibody. The agent can include other featuresdescribed herein.

In another aspect, the invention features a method of evaluating a testcompound. The method includes evaluating interaction between an agentthat can modulate the activity of Tie1 and a protein that includes atleast a region of the Tie1 extracellular domain in the presence of thetest compound. In one embodiment, the agent is a test compound is asmall organic compound with molecular weight less than 8000, 7000, 6000,5000, or 3000 Daltons. For example, the evaluating includes contactingcells that include the protein that includes at least a region of theTie1 extracellular domain with the agent in the presence of the testcompound. In another example, the evaluating includes forming acell-free preparation that includes the protein that includes at least aregion of the Tie1 extracellular domain, the agent, and the testcompound.

In another aspect, the invention features an artificial protein complexthat includes (i) a protein that includes a Tie1 extracellular domainand (ii) a Tie1 binding protein that can modulate (e.g., agonize orantagonize) an activity of Tie1. In one embodiment, the ligand is anantibody (e.g., an antibody described herein). For example, the ligandincludes the HC and LC immunoglobulin variable domains of an antibodyselected from the group consisting of: E3, E3b, B2, D11, A2, A10, P-B1,P-B3, P-C6, G2 and C7, or immunoglobulin domains that are at least 90%identical in the CDR regions to the CDR regions of the respectiveantibody. In one embodiment, the complex is present in a membranefraction, on a mammalian cell, and/or in a subject.

In another aspect the invention features a method that includes:administering a composition that includes a protein that interacts withTie1, Tie2, or Ang (e.g., a protein described herein) to a subject in anamount effective to reduce angiogenesis in the subject or otherwisetreat or prevent a disorder in a subject. For example, the protein bindsto Tie1, Tie2, or Ang with an affinity K_(D) of less than 10⁻⁸ M, 5·10⁻⁹M, 10⁻⁹ M, 10⁻¹⁰ M, 10⁻¹¹ M, or 10⁻¹² M.

In one embodiment, the protein is a Tie1 binding protein. The proteincan have at least two valencies, each of which binds to Tie1. Forexample, at least one, two, or all of the valencies can be binding sitesthat competes with E3 for binding to Tie1. In one embodiment, theprotein competes with E3 for binding to Tie1 or binds to an epitope thatoverlaps the epitope bound by E3 on Tie1.

In one embodiment, the protein comprises a heavy chain immunoglobulinvariable domain sequence and a light chain immunoglobulin variabledomain sequence. The protein further includes one or more of thefollowing properties: (1) at least one of the variable domain sequencescomprising at least one CDR of the E3 antibody; (2) at least one of thevariable domain sequences comprising CDR sequences at least 85%identical, in sum, to the CDRs of the corresponding variable domain ofthe E3 antibody; (3) at least one of the variable domains is at least85% identical to the corresponding immunoglobulin variable domains ofthe E3 antibody, and (4) the protein competes with E3 for binding toTie1 or binds to an epitope that overlaps the epitope bound by E3 onTie1.

In one embodiment, one or more of the CDRs of the heavy and/or lightchain variable domain sequence are human, primate, non-rodent (e.g.,non-mouse or non-rat), or synthetic. In one embodiment, one or more ofthe framework regions of the heavy and/or light chain variable domainsequence are human, primate, or non-rodent (e.g., non-mouse or non-rat).

In one embodiment, the heavy chain includes one or more of the followingproperties:

i) a HC CDR1 that includes an amino acid sequence as follows:

(AGSR)-Y-(GVK)-M-(GSVF), (SEQ ID NO:117)

(AGSIMRH)-Y-(GVMK)-M-(GSVMFH) (SEQ ID NO:118), or

(AGSIMRNH)-Y-(AGTVMKPQ)-M-(AGSTVMYWFKH) (SEQ ID NO:119);

ii) a HC CDR2 that includes an amino acid sequence as follows:

X-I-Y-P-S-G-G-X-T-X-Y-A-D-S-V-K-G (SEQ ID NO:120), wherein X is anyamino acid,

(GSV)-I-(SY)-P-S-G-G-(WQ)-T-(GY) (SEQ ID NO:121),

(GSV)-I-(SY)-P-S-G-G-(WQ)-T-(GY)-Y-A-D-S-V-K-G (SEQ ID NO:122),

(GSVW)-I-(SY)-P-S-G-G-(AGVMYWPQH)-T-(AGSTLVMYFKH) (SEQ ID NO:123); or

X-I-Y-P-S-G-G-(WPS)-T-(YVH)-Y-A-D (SEQ ID NO:704), wherein X is anyamino acid;

iii) a HC CDR3 that includes an amino acid sequence as follows:

V-(four or five residues)-F-D-(I/Y) (SEQ ID NO:124),

G-Y-G-P-I-A-P-G-L-D-Y (SEQ ID NO:125),

(GV)-N-Y-Y-(GYD)-S-(SD)-G-Y-G-P-I-A-P-G-L-D-Y (SEQ ID NO:126),

(GVD)-(AGLN)-(LYR)-(GSTLYH)-(GYD)-(AGSYFP)-(SFD)-(AGYD)-(IY)-(GFD)-(YDP)-(IP)-A-P-G-L-D-Y(SEQ ID NO:127),

VNYYDSSGYGPIAPGLDY (SEQ ID NO:128), or

G-X-X-G-(AY)-F-D-(YI) (SEQ ID NO:705), wherein X is any amino acid.

In one embodiment, the light chain includes one or more of the followingproperties: i) a light chain cdr1 that includes an amino acid sequenceas follows:

R-A-S-Q-S-(IV)-S-(SR)-X1-Y-L-(AN) (SEQ ID NO:129),

R-A-S-Q-S-(IV)-S-S-(YS)-L-(ALN) (SEQ ID NO:706),

T-G-T-(SN)-S-D-V-G-(GS)-Y (SEQ ID NO:707),

(SGQ)-(GS)-(DS)-(NS)-(IL)-(GR)-S-(YKN)-(YS)-(VA) (SEQ ID NO:708),

R-A-S-Q-S-V-S-S-X-L (SEQ ID NO:130),

R-A-S-Q-S-(IV)-S-(SR)-(SY)-(LY)-(ALN) (SEQ ID NO:131), OR

R-A-S-(REQ)-(GSTRN)-(IV)-(GSTIRN)-(STIRH)-X1-(SYWNH)-(LV)-(ASN) (SEQ IDNO:132), wherein X1 can be serine or absent;

ii) a LC CDR2 that includes an amino acid sequence as follows:

X-A-S-X-R-A-T (SEQ ID NO:133), wherein X can be any amino acid,

(AGD)-A-S-(STN)-R-A-T (SEQ ID NO:134),

(DG)-(AV)-S-N-(RL)-(AP)-ST) (SEQ ID NO:709),

(AGD)-A-S-(STN)-(LR)-(AEQ)-(ST) (SEQ ID NO:135), OR

(AGTKDEH)-A-S-(STN)-(LR)-(AVEQ)-(ST) (SEQ ID NO:136); AND

iii) a LC CDR3 that includes an amino acid sequence as follows:

Q-Q-(SYFR)-(GSYN)-S-(STYW)-(RP)-(LWR)-(TIY)-T (SEQ ID NO:137),

(LQ)-Q-(SYFR)-(GSYN)-(SKN)-(STYW)-(RP)-(LWR)-(TIY)-T (SEQ ID NO:138),

Q-Q-X-S-(SN)-(WS)-P-X-T-F (SEQ ID NO:710), wherein x is any amino acid,

Y-(TG)-(SG)-S-(PGS)-(TN)-X-(VT) (SEQ ID NO:711), wherein x is any aminoacid,

Q-Q-(YR)-(GS)-S-(SW)-P-R-X1-T (SEQ ID NO:139), wherein X1 is any aminoacid or absent,

(LQ)-(LQ)-(SYFRD)-(GSYN)-(STRKN)-(STYWF)-(RP)-(ILMWRH)-(TIY)-(TI) (SEQID NO:140), or

(LQ)-(LRQ)-(SYFRD)-(GSYN)-(ASTRKN)-(STYWF)-(SVRP)-(STILMWRH)-(TIY)-(STI)(SEQ ID NO:141).

In one embodiment, the heavy chain includes one or more of the followingproperties:

i) a HC CDR1 that includes an amino acid sequence as follows:

(AGSIMRH)-Y-(GVMK)-M-(GSVMFH) (SEQ ID NO:118), or

(AGSIMRNH)-Y-(AGTVMKPQ)-M-(AGSTVMYWFKH) (SEQ ID NO:119);

ii) a HC CDR2 that includes an amino acid sequence as follows:

(GSV)-I-(SY)-P-S-G-G-(NWQ)-T-(GY) (SEQ ID NO:160),

(GSV)-I-(SY)-P-S-G-G-(NWQ)-T-(GY)-Y-A-D-S-V-K-G (SEQ ID NO:122), or

(GSVW)-I-(SY)-P-S-G-G-(AGVMYWPQH)-T-(AGSTLVMYFKH) (SEQ ID NO:123);

iii) a HC CDR3 that includes an amino acid sequence as follows:

APRGYSYGYYY (SEQ ID NO:712).

In one embodiment, the light chain includes one or more of the followingproperties: i) a LC CDR1 that includes an amino acid sequence asfollows: R-A-S-(REQ)-(GSTRN)-(IV)-(GSTIRN)-(STIRH)-X1-(SYWNH)-(LV)-(ASN)(SEQ ID NO:132), wherein X1 can be serine or absent; ii) a LC CDR2 thatincludes an amino acid sequence as follows:(TAGD)-A-S-(STN)-(LR)-(AEQ)-(ST) (SEQ ID NO:713), or(AGTKDEH)-A-S-(STN)-(LR)-(AVEQ)-(ST) (SEQ ID NO:136); and iii) a LC CDR3that includes an amino acid sequence as follows:Q-Q-(SYFR)-(GSYN)-S-(STYW)-(RP)-(LHWR)-(TIY) (SEQ ID NO:714),(LQ)-Q-(SYFR)-(GSYN)-(SKN)-(STYW)-(RP)-(LHWR)-(TIY) (SEQ ID NO:715), or(LQ)-(LQ)-(SYFRD)-(GSYN)-(STRKN)-(STYWF)-(RP)-(ILMWRH)-(TIY) (SEQ IDNO:716).

In one embodiment, the light chain includes one or more of the followingproperties: i) a LC CDR1 that includes an amino acid sequence asfollows: S-X-(ND)-(IV)-(AG)-X1-X2-X3 (SEQ ID NO:142), orT-(GR)-(ST)-S-X5-(ND)-(IV)-(AG)-X1-X2-X3-Y-X4-S (SEQ ID NO:143), whereinX1 is any amino acid (e.g., G or R), X2 is any amino acid (e.g., Y orN), X3 is any amino acid (e.g., F, N, or K), X4 is any amino acid (e.g.,aliphatic, e.g., V or A); iii) a LC CDR2 that includes an amino acidsequence as follows: (DE)-V-N-N-R-P-S (SEQ ID NO:144);(DE)-(VD)-(STDN)-(YRDN)-R-P-S (SEQ ID NO:145); v) a LC CDR3 thatincludes an amino acid sequence as follows:(SQ)-S-(SY)-(ASID)-(GSR)-(ST)-(STRN)-(STYR)-(ATLY)-(SVWQ) (SEQ IDNO:146).

In one embodiment, the HC CDR2 includes an amino acid sequence asfollows:(GSVW)-I-(SY)-P-SG-G-(AGVMYWPQH)-T-(AGSTLVMYFKH)-Y-(AT)-D-S-V-K-G (SEQID NO:147)or (GSV)-I-(SY)-P-SG-G-(WQ)-T-(GY)-Y-(AT)-D-S-V-K-G (SEQ IDNO:148).

In one embodiment, the HC CDR1 amino acid sequences have a length of atleast 5 amino acids of which at least 3, 4, or 5 amino acids areidentical to the CDR1 sequence of the HC of clone E3, E3b, G2, p-A1,p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2,s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, or anotherantibody described herein. In one embodiment, the HC CDR2 amino acidsequences have a length of at least 15, 16, or 17 amino acids of whichat least 10, 12, 14, 15, 16, or 17 amino acids are identical to the CDR2sequence of the HC of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6,p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2,s-C7, s-D11, s-E11, s-G10, s-H4, or another antibody described herein.In one embodiment, the HC CDR2 amino acid sequences have a length of atleast 17 amino acids of which at least 14, 15, 16, or 17 amino acids areidentical to the CDR2 sequence of the HC of clone E3, E3b, G2, p-A1,p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2,s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, or anotherantibody described herein. In one embodiment, the HC CDR3 amino acidsequences have a length of at least of at least 7 or 8 amino acids ofwhich at least 5, 6, 7, or 8 amino acids are identical to the CDR3sequence of the HC of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6,p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2,s-C7, s-D11, s-E11, s-G10, s-H4, or another antibody described herein.

In one embodiment, the LC CDR1 amino acid sequences have a length of atleast 10, 11, or 12 amino acids of which at least 7, 8, 9, 10, or 11amino acids are identical to the CDR1 sequence of the LC of clone E3,E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10,s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, oranother antibody described herein. In one embodiment, the LC CDR2 aminoacid sequences have a length of at least 6 or 7 amino acids of which atleast 5, 6, or 7 amino acids are identical to the CDR2 sequence of theLC of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3,p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C1, s-C2, s-C7, s-D11,s-E11, s-G10, s-H4, or another antibody described herein. In oneembodiment, the LC CDR3 amino acid sequences have a length of at leastof at least 8, 9, or 10 amino acids of which at least 7, 8, 9, or 10amino acids are identical to the CDR3 sequence of the LC of clone E3,E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10,s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, oranother antibody described herein.

In one embodiment, the amino acid sequence of the HC variable domainsequence is at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or 100%identical to the amino acid sequence of the HC variable domain of cloneE3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3,s-A10, s-H1, s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D11, s-E11, s-G10,s-H4, or another antibody described herein.

In one embodiment, the amino acid sequence of the LC variable domainsequence is at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or 100%identical to the amino acid sequence of the LC variable domain of cloneE3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3,s-A10, s-H1, s-A2, s-B2, s-B9, s-C1, s-C2, s-C7, s-D11, s-E11, s-G10,s-H4, or another antibody described herein.

In one embodiment, the amino acid sequences of the HC and LC variabledomain sequences are at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or100% identical to the amino acid sequences of the HC and LC variabledomains of a clone selected from the group consisting of E3, E3b, G2,p-A1, p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1,s-A2, s-B2, s-B9, s-C10, s-C2, s-C7, s-D 11, s-E11, s-G10, and s-H4.

In one embodiment, the amino acid sequences of one or more frameworkregions (e.g., FR1, FR2, FR3, and/or FR4) of the HC and/or LC variabledomain are at least 70, 80, 85, 90, 92, 95, 97, 98, 99, or 100%identical to corresponding framework regions of the HC and LC variabledomains of clone E3, E3b, G2, p-A1, p-A10, p-B1, p-B3, p-C6, p-D12,p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C1, s-C2, s-C7,s-D11, s-E11, s-G 10, s-H4, or another antibody described herein.

In one embodiment, the light chain variable domain sequence is human ornon-immunogenic in a human. In one embodiment, the heavy chain variabledomain sequence is human or non-immunogenic in a human.

The protein can bind to cells that express Tie1, e.g., endothelialcells. In one embodiment, the protein does not substantially bind (e.g.,does not detectably bind) to platelets.

In one embodiment, the protein specifically binds to Tie1, e.g., itbinds with at least a 10, 50, 100, 10³, or 10⁴ fold preference for Tie1relative to another human protein, e.g., Tie2, a natural protein otherthan Tie1 that has a Ig-like domain, an EGF-like domain, or fibronectinType III repeat, or human serum albumin. In one embodiment, the proteinbinds to a domain of Tie1 described herein.

In one embodiment, the protein is delivered locally. In one embodiment,the protein is delivered systemically.

In one embodiment, the subject is in need of reduced angiogenesis, oridentified as such. For example, the subject has an angiogenesis-relateddisorder. In another example, the subject has a neoplastic disorder,e.g., a metastatic cancer. For example, the subject has anangiogenesis-dependent cancer or tumor. The tumor can be a solid tumor,e.g., a tumor at least 1, 2, 3, 5, 8 or 10 mm in diameter. In oneembodiment, the solid tumor has a hypoxic core. The method can furtherinclude administering an anti-metabolite (e.g., 5-FU, with leucovorin),irinotecan, (or other topoisomerase inhibitor), doxorubicin,bevacizumab, or all of these agents. The method can include, prior toadministering the antagonist, evaluating the subject and detecting asolid tumor in the subject.

In another embodiment, the subject has an inflammatory disorder, e.g.,rheumatoid arthritis, psoriasis, rheumatoid or rheumatic inflammatorydisease, or other chronic inflammatory disorders, such as chronicasthma, arterial or post-transplantational atherosclerosis, andendometriosis. Other disorders that can be treated include those thathave deregulated or undesired angiogenesis, such as ocularneovascularization, e.g., retinopathies (including diabetic retinopathyand age-related macular degeneration) hemangioblastoma, hemangioma, andarteriosclerosis.

In one embodiment, the protein is administered in an amount effective toreduce one or more of the following activities: sprouting, splitting andremodeling of blood vessels. In one embodiment, the protein isadministered in an amount effective to reduce vasculogenesis or tubuleformation.

In one embodiment, the method further includes, prior to theadministering, identifying the subject as a subject in need of reducedangiogenesis. In one embodiment, the method further includesadministering the protein continuously or in separate boluses. In oneembodiment, the method further includes monitoring the subject duringthe course of administration. For example, the monitoring includesimaging blood vessels (locally or throughout) the subject. In anotherexample, the monitoring include evaluating tumor size or tumor load inthe subject.

In another aspect the invention features a method that includes:administering a composition that includes a protein described herein(e.g., a protein that reduces a Tie1 activity) to a subject in an amounteffective to reduce a Tie1 activity in the subject. The method caninclude other features described herein.

In another aspect the invention features a method that includes:administering a composition that includes a protein described herein(e.g., a protein that can modulate an activity of Tie1) to a subject inan amount effective to modulate endothelial cell activity in thesubject. In one embodiment, the protein is delivered into thecirculation.

In one embodiment, the composition is effective for sensitizingendothelial cells to a treatment, and providing a treatment to thesubject that inhibits, kills, ablates, or otherwise arrests thesensitized endothelial cells.

In another aspect the invention features a method that includes: (i)contacting the sample (and optionally, a reference, e.g., control,sample) with a protein that binds to Tie1, e.g., a protein describedherein, under conditions that allow interaction of the Tie1-bindingprotein and the Tie1 protein to occur; and (ii) detecting formation of acomplex between the Tie1-binding protein, and the sample (andoptionally, the reference, e.g., control, sample).

In another aspect the invention features a method that includes: (i)administering to a subject (and optionally a control subject) aTie1-binding protein (e.g., an antibody or antigen binding fragmentthereof), under conditions that allow interaction of the Tie1-bindingprotein and the Tie1 protein to occur; and (ii) detecting formation of acomplex between the Tie1-binding protein and a Tie1 molecule of thesubject or detecting distribution of Tie1-binding protein or at leastone location of the Tie1-binding protein in the subject. In oneembodiment, the Tie1-binding protein does not modulate the activity ofTie1. The Tie1-binding protein can be a protein described herein. In oneembodiment, the ligand detects activated Tie1.

An antibody that binds to Tie1 is preferably monospecific, e.g., amonoclonal antibody, or antigen-binding fragment thereof. For example,the antibody can recognize Tie1 on a living cell, e.g., an endogenousTie1 molecule or a Tie1 molecule that is expressed from a heterologousnucleic acid. In one embodiment, the Tie1-binding protein interacts withprimary endothelial cells. The term “monospecific antibody” refers to anantibody that displays a single binding specificity and affinity for aparticular target, e.g., epitope. This term includes a “monoclonalantibody” which refers to an antibody that is produced as a singlemolecular species, e.g., from a population of homogenous isolated cells.A “monoclonal antibody composition” refers to a preparation ofantibodies or fragments thereof of in a composition that includes asingle molecular species of antibody. In one embodiment, a monoclonalantibody is produced by a mammalian cell. One or more monoclonalantibody species may be combined.

The Tie1-binding antibodies can be full-length (e.g., an IgG (e.g., anIgG1, IgG2, IgG3, IgG4), IgM, IgA (e.g., IgA1, IgA2), IgD, and IgE) orcan include only an antigen-binding fragment (e.g., a Fab, F(ab′)₂ orscFv fragment), e.g., it does not include an Fc domain or a CH2, CH3, orCH4 sequence. The antibody can include two heavy chain immunoglobulinsand two light chain immunoglobulins, or can be a single chain antibody.The antibodies can, optionally, include a constant region chosen from akappa, lambda, alpha, gamma, delta, epsilon or a mu constant regiongene. A Tie1-binding antibody can include a heavy and light chainconstant region substantially from a human antibody, e.g., a human IgG1constant region or a portion thereof.

In one embodiment, the antibody (or fragment thereof) is a recombinantor modified antibody, e.g., a chimeric, a humanized, a deimmunized, oran in vitro generated antibody. The term “recombinant” or “modified”human antibody, as used herein, is intended to include all antibodiesthat are prepared, expressed, created or isolated by recombinant means,such as antibodies expressed using a recombinant expression vectortransfected into a host cell, antibodies isolated from a recombinant,combinatorial antibody library, antibodies isolated from an animal(e.g., a mouse) that is transgenic for human immunoglobulin genes orantibodies prepared, expressed, created or isolated by any other meansthat involves splicing of human immunoglobulin gene sequences to otherDNA sequences. Such recombinant antibodies include humanized, CDRgrafted, chimeric, deimmunized, in vitro generated antibodies, and mayoptionally include constant regions derived from human germlineimmunoglobulin sequences.

In one embodiment, the antibody binds to an epitope distinct from anepitope bound by known monoclonal antibodies that bind to Tie1, e.g., anantibody described in WO 95/26364, e.g., 3C4C7G6 and 10F11G6. In otherembodiments, the antibody does not compete with known monoclonalantibodies that bind to Tie1, e.g., 3C4C7G6 and 10F11G6. In still otherembodiments, the antibody does not compete with ligand described herein,e.g., the E3 antibody.

Also within the scope of the invention are antibodies or other agents(e.g., protein or non-protein agents) that bind overlapping epitopes of,or competitively inhibit the binding of the proteins disclosed herein,e.g., proteins that bind to Tie1, Tie2, or Ang. For example, theantibodies or other agents bind overlapping epitopes of or competitivelyinhibit the binding of monospecific antibodies, e.g., E3, E3b, G2, p-A1,p-A10, p-B1, p-B3, p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2,s-B2, s-B9, s-C1, s-C2, s-C7, s-D11, s-E11, s-G10, s-H4, or anotherantibody described herein to Tie1, or vice versa (e.g., the monospecificantibodies competitively inhibiting binding of the ligands). Overlappingepitopes can include at least one amino acid in common. Agents thatcompetitively inhibit binding of one another do not necessarily bind tooverlapping epitopes. For example, they may inhibit binding by stericinterference or by altering the conformation of Tie1.

Any combination of binding proteins is within the scope of theinvention, e.g., two or more antibodies that bind to different regionsof Tie1, Tie2, or Ang, e.g., antibodies that bind to two differentepitopes on the extracellular domain of Tie1, Tie2, or Ang, e.g., abispecific antibody.

In one embodiment, the Tie1-binding antibody or antigen-binding fragmentthereof includes at least one light or heavy chain immunoglobulin (orpreferably, at least one light chain immunoglobulin and at least oneheavy chain immunoglobulin). Preferably, each immunoglobulin includes alight or a heavy chain variable region having at least one, two and,preferably, three complementarity determining regions (CDRs)substantially identical to a CDR from an anti-Tie1 light or heavy chainvariable region, respectively, i.e., from a variable region of anantibody described herein, e.g., E3, E3b, G2, p-A1, p-A10, p-B1, p-B3,p-C6, p-D12, p-F3, p-F4, p-G3, s-A10, s-H1, s-A2, s-B2, s-B9, s-C10,s-C2, s-C7, s-D 11, s-E11, s-G10, s-H4, or another antibody describedherein.

In one aspect, the invention features an agent (e.g., an antibody) thatdecreases endothelial cell activity by increasing Tie1 phosphorylation.In one embodiment, the agent decreases endothelial cell differentiation,e.g., sprouting, splitting, and tube formation.

In one aspect, the invention features an agent (e.g., an antibody) thatdecreases endothelial cell activity by activating a signaling pathway.In one embodiment, the antibody decreases endothelial celldifferentiation, e.g., sprouting, splitting, and tube formation. Thisagent-induced effect can be independent or dependent of Tie1self-association.

In one aspect, the invention features an isolated protein that includesa heavy chain immunoglobulin variable domain sequence and a light chainimmunoglobulin variable domain sequence, wherein the protein binds toTie1 ectodomain and the heavy chain immunoglobulin variable domainsequence includes one or more of the following properties: i) a HC CDR1that includes an amino acid sequence of a clone from the groupconsisting of: M0044-A06; M0044-A11; M0044-B04; M0044-B05; M0044-B08;M0044-B09; M0044-B10; M0044-B12; M0044-C07; M0044-D01; M0044-E03;M0044-F03; M0044-F06; M0044-F09; M0044-G06; M0044-G07; M0044-G11;M0044-H03; M0044-H05; M0044-H07; M0044-H09; M0045-A02; M0045-A04;M0045-B01; M0045-B03; M0045-B11; M0045-C02; M0045-C11; M0045-C12;M0045-D01; M0045-D07; M0045-G01; M0045-G10; M0046-A11; M0046-B06;M0046-B10; M0046-G12; M0046-H03; M0046-H10; M0046-H11; M0047-B03;M0047-D01; M0047-D03; M0047-E10; M0047-G09; M0053-A02; M0053-A03;M0053-A05; M0053-A09; M0053-B09; M0053-B11; M0053-D03; M0053-D06;M0053-D12; M0053-E03; M0053-E04; M0053-E08; M0053-F04; M0053-F05;M0053-F06; M0053-F08; M0053-G04; M0053-G05; M0054-A08; M0054-B06;M0054-B08; M0054-C03; M0054-C07; M0054-E04; M0054-G01; M0054-G05;M0054-H10; M0055-A09; M0055-B11; M0055-B12; M0055-C05; M0055-C07;M0055-D03; M0055-D06; M0055-D12; M0055-E04; M0055-E06; M0055-E10;M0055-E12; M0055-F10; M0055-G02; M0055-G03; M0055-H04; M0056-A01;M0056-A06; M0056-B08; M0056-B09; M0056-C03; M0056-C004; M0056-E08;M0056-F01; M0056-F02; M0056-F10; M0056-F11; M0056-G03; M0056-G04;M0056-G08; M0056-G12; M0056-H04; M0056-H12; M0057-B05; M0057-H07;M0058-A09; M0058-D04; M0058-E09; M0058-F03; M0058-G03; M0058-H01;M0059-A02; M0059-A06; M0060-B02; M0060-H01; M0061-A03; M0061-C05;M0061-C06; M0061-F07; M0061-G12; M0061-H09; M0062-A12; M0062-B05;M0062-B07; M0062-C08; M0062-D04; M0062-E02; M0062-E03; M0062-E11;M0062-F10; M0062-G06; and M0062-H01, or a sequence that is at least 70,75, 80, 85, or 90% identical to such a sequence; ii) a HC CDR2 thatincludes an amino acid sequence of a clone from the group consisting ofM0044-A06; M0044-A11; M0044-B04; M0044-B05; M0044-B08; M0044-B09;M0044-B10; M0044-B12; M0044-C07; M0044-D01; M0044-E03; M0044-F03;M0044-F06; M0044-F09; M0044-G06; M0044-G07; M0044-G11; M0044-H03;M0044-H05; M0044-H07; M0044-H09; M0045-A02; M0045-A04; M0045-B01;M0045-B03; M0045-B11; M0045-C02; M0045-C11; M0045-C12; M0045-D01;M0045-D07; M0045-G01; M0045-G10; M0046-A11; M0046-B06; M0046-B10;M0046-G12; M0046-H03; M0046-H10; M0046-H11; M0047-B03; M0047-D01;M0047-D03; M0047-E10; M0047-G09; M0053-A02; M0053-A03; M0053-A05;M0053-A09; M0053-B09; M0053-B11; M0053-D03; M0053-D06; M0053-D12;M0053-E03; M0053-E04; M0053-E08; M0053-F04; M0053-F05; M0053-F06;M0053-F08; M0053-G04; M0053-G05; M0054-A08; M0054-B06; M0054-B08;M0054-C03; M0054-C07; M0054-E04; M0054-G01; M0054-G05; M0054-H10;M0055-A09; M0055-B11; M0055-B12; M0055-C05; M0055-C07; M0055-D03;M0055-D06; M0055-D12; M0055-E04; M0055-E06; M0055-E10; M0055-E12;M0055-F10; M0055-G02; M0055-G03; M0055-H04; M0056-A01; M0056-A06;M0056-B08; M0056-B09; M0056-C03; M0056-C04; M0056-E08; M0056-F01;M0056-F02; M0056-F10; M0056-F11; M0056-G03; M0056-G04; M0056-G08;M0056-G12; M0056-H04; M0056-H12; M0057-B05; M0057-H07; M0058-A09;M0058-D04; M0058-E09; M0058-F03; M0058-G03; M0058-H01; M0059-A02;M0059-A06; M0060-B02; M0060-H01; M0061-A03; M0061-C05; M0061-C06;M0061-F07; M0061-G12; M0061-H09; M0062-A12; M0062-B05; M0062-B07;M0062-C08; M0062-D04; M0062-E02; M0062-E03; M0062-E11; M0062-F10;M0062-G06; and M0062-H01, or a sequence that is at least 70, 75, 80, 85,or 90% identical to such a sequence; iii) a HC CDR3 that includes anamino acid sequence of a clone from the group consisting of: M0044-A06;M0044-A11; M0044-B04; M0044-B05; M0044-B08; M0044-B09; M0044-B10;M0044-B12; M0044-C07; M0044-D01; M0044-E03; M0044-F03; M0044-F06;M0044-F09; M0044-G06; M0044-G07; M0044-G11; M0044-H03; M0044-H05;M0044-H07; M0044-H09; M0045-A02; M0045-A04; M0045-B01; M0045-B03;M0045-B11; M0045-C02; M0045-C11; M0045-C12; M0045-D01; M0045-D07;M0045-G01; M0045-G10; M0046-A11; M0046-B06; M0046-B10; M0046-G12;M0046-H03; M0046-H10; M0046-H11; M0047-B03; M0047-D01; M0047-D03;M0047-E10; M0047-G09; M0053-A02; M0053-A03; M0053-A05; M0053-A09;M0053-B09; M0053-B11; M0053-D03; M0053-D06; M0053-D12; M0053-E03;M0053-E04; M0053-E08; M0053-F04; M0053-F05; M0053-F06; M0053-F08;M0053-G04; M0053-G05; M0054-A08; M0054-B06; M0054-B08; M0054-C03;M0054-C07; M0054-E04; M0054-G01; M0054-G05; M0054-H10; M0055-A09;M0055-B11; M0055-B12; M0055-C05; M0055-C07; M0055-D03; M0055-D06;M0055-D12; M0055-E04; M0055-E06; M0055-E10; M0055-E12; M0055-F10;M0055-G02; M0055-G03; M0055-H04; M0056-A01; M0056-A06; M0056-B08;M0056-B09; M0056-C03; M0056-C04; M0056-E08; M0056-F01; M0056-F02;M0056-F10; M0056-F11; M0056-G03; M0056-G04; M0056-G08; M0056-G12;M0056-H04; M0056-H12; M0057-B05; M0057-H07; M0058-A09; M0058-D04;M0058-E09; M0058-F03; M0058-G03; M0058-H01; M0059-A02; M0059-A06;M0060-B02; M0060-H01; M0061-A03; M0061-C05; M0061-C06; M0061-F07;M0061-G12; M0061-H09; M0062-A12; M0062-B05; M0062-B07; M0062-C08;M0062-D04; M0062-E02; M0062-E03; M0062-E11; M0062-F10; M0062-G06; andM0062-H01, or a sequence that is at least 70, 75, 80, 85, or 90%identical to such a sequence.

In one embodiment, the protein also includes the light chainimmunoglobulin variable domain sequence which includes one or more ofthe following properties: i) a LC CDR1 that includes an amino acidsequence of a clone from the group consisting of M0044-A06; M0044-A11;M0044-B04; M0044-B05; M0044-B08; M0044-B09; M0044-B10; M0044-B12;M0044-C07; M0044-D01; M0044-E03; M0044-F03; M0044-F06; M0044-F09;M0044-G06; M0044-G07; M0044-G11; M0044-H03; M0044-H05; M0044-H07;M0044-H09; M0045-A02; M0045-A04; M0045-B01; M0045-B03; M0045-B11;M0045-C02; M0045-C11; M0045-C12; M0045-D01; M0045-D07; M0045-G01;M0045-G10; M0046-A11; M0046-B06; M0046-B10; M0046-G12; M0046-H03;M0046-H10; M0046-H11; M0047-B03; M0047-D01; M0047-D03; M0047-E10;M0047-G09; M0053-A02; M0053-A03; M0053-A05; M0053-A09; M0053-B09;M0053-B11; M0053-D03; M0053-D06; M0053-D12; M0053-E03; M0053-E04;M0053-E08; M0053-F04; M0053-F05; M0053-F06; M0053-F08; M0053-G04;M0053-G05; M0054-A08; M0054-B06; M0054-B08; M0054-C03; M0054-C07;M0054-E04; M0054-G01; M0054-G05; M0054-H10; M0055-A09; M0055-B11;M0055-B12; M0055-C05; M0055-C07; M0055-D03; M0055-D06; M0055-D12;M0055-E04; M0055-E06; M0055-E10; M0055-E12; M0055-F10; M0055-G02;M0055-G03; M0055-H04; M0056-A01; M0056-A06; M0056-B08; M0056-B09;M0056-C03; M0056-C04; M0056-E08; M0056-F01; M0056-F02; M0056-F10;M0056-F11; M0056-G03; M0056-G04; M0056-G08; M0056-G12; M0056-H04;M0056-H12; M0057-B05; M0057-H07; M0058-A09; M0058-D04; M0058-E09;M0058-F03; M0058-G03; M0058-H01; M0059-A02; M0059-A06; M0060-B02;M0060-H01; M0061-A03; M0061-C05; M0061-C06; M0061-F07; M0061-G12;M0061-H09; M0062-A12; M0062-B05; M0062-B07; M0062-C08; M0062-D04;M0062-E02; M0062-E03; M0062-E11; M0062-F10; M0062-G06; and M0062-H01, ora sequence that is at least 70, 75, 80, 85, or 90% identical to such asequence; ii) a LC CDR2 that includes an amino acid sequence of a clonefrom the group consisting of: M0044-A06; M0044-A11; M0044-B04;M0044-B05; M0044-B08; M0044-B09; M0044-B10; M0044-B12; M0044-C07;M0044-D01; M0044-E03; M0044-F03; M0044-F06; M0044-F09; M0044-G06;M0044-G07; M0044-G11; M0044-H03; M0044-H05; M0044-H07; M0044-H09;M0045-A02; M0045-A04; M0045-B01; M0045-B03; M0045-B11; M0045-C02;M0045-C11; M0045-C12; M0045-D01; M0045-D07; M0045-G01; M0045-G10;M0046-A11; M0046-B06; M0046-B10; M0046-G12; M0046-H03; M0046-H10;M0046-H11; M0047-B03; M0047-D01; M0047-D03; M0047-E10; M0047-G09;M0053-A02; M0053-A03; M0053-A05; M0053-A09; M0053-B09; M0053-B11;M0053-D03; M0053-D06; M0053-D12; M0053-E03; M0053-E04; M0053-E08;M0053-F04; M0053-F05; M0053-F06; M0053-F08; M0053-G04; M0053-G05;M0054-A08; M0054-B06; M0054-B08; M0054-C03; M0054-C07; M0054-E04;M0054-G01; M0054-G05; M0054-H10; M0055-A09; M0055-B11; M0055-B12;M0055-C05; M0055-C07; M0055-D03; M0055-D06; M0055-D12; M0055-E04;M0055-E06; M0055-E10; M0055-E12; M0055-F10; M0055-G02; M0055-G03;M0055-H04; M0056-A01; M0056-A06; M0056-B08; M0056-B09; M0056-C03;M0056-C04; M0056-E08; M0056-F01; M0056-F02; M0056-F10; M0056-F11;M0056-G03; M0056-G04; M0056-G08; M0056-G12; M0056-H04; M0056-H12;M0057-B05; M0057-H07; M0058-A09; M0058-D04; M0058-E09; M0058-F03;M0058-G03; M0058-H01; M0059-A02; M0059-A06; M0060-B02; M0060-H01;M0061-A03; M0061-C05; M0061-C06; M0061-F07; M0061-G12; M0061-H09;M0062-A12; M0062-B05; M0062-B07; M0062-C08; M0062-D04; M0062-E02;M0062-E03; M0062-E11; M0062-F10; M0062-G06; and M0062-H01, or a sequencethat is at least 70, 75, 80, 85, or 90% identical to such a sequence;iii) a LC CDR3 that includes an amino acid sequence of a clone from thegroup consisting of: M0044-A06; M0044-A11; M0044-B04; M0044-B05;M0044-B08; M0044-B09; M0044-B10; M0044-B12; M0044-C07; M0044-D01;M0044-E03; M0044-F03; M0044-F06; M0044-F09; M0044-G06; M0044-G07;M0044-G11; M0044-H03; M0044-H05; M0044-H07; M0044-H09; M0045-A02;M0045-A04; M0045-B01; M0045-B03; M0045-B11; M0045-C02; M0045-C11;M0045-C12; M0045-D01; M0045-D07; M0045-G01; M0045-G10; M0046-A11;M0046-B06; M0046-B10; M0046-G12; M0046-H03; M0046-H10; M0046-H11;M0047-B03; M0047-D01; M0047-D03; M0047-E10; M0047-G09; M0053-A02;M0053-A03; M0053-A05; M0053-A09; M0053-B09; M0053-B11; M0053-D03;M0053-D06; M0053-D12; M0053-E03; M0053-E04; M0053-E08; M0053-F04;M0053-F05; M0053-F06; M0053-F08; M0053-C04; M0053-G05; M0054-A08;M0054-B06; M0054-B08; M0054-C03; M0054-C07; M0054-E04; M0054-G01;M0054-G05; M0054-H10; M0055-A09; M0055-B11; M0055-B12; M0055-C05;M0055-C07; M0055-D03; M0055-D06; M0055-D12; M0055-E04; M0055-E06;M0055-E10; M0055-E12; M0055-F10; M0055-G02; M0055-G03; M0055-H04;M0056-A01; M0056-A06; M0056-B08; M0056-B09; M0056-C03; M0056-C04;M0056-E08; M0056-F01; M0056-F02; M0056-F10; M0056-F11; M0056-C03;M0056-G04; M0056-G08; M0056-G12; M0056-H04; M0056-H12; M0057-B05;M0057-H07; M0058-A09; M0058-D04; M0058-E09; M0058-F03; M0058-G03;M0058-H01; M0059-A02; M0059-A06; M0060-B02; M0060-H01; M0061-A03;M0061-C05; M0061-C06; M0061-F07; M0061-G12; M0061-H09; M0062-A12;M0062-B05; M0062-B07; M0062-C08; M0062-D04; M0062-E02; M0062-E03;M0062-E11; M0062-F10; M0062-G06; and M0062-H01, or a sequence that is atleast 70, 75, 80, 85, or 90% identical to such a sequence.

In one embodiment, the protein includes the amino acid sequence of theHC variable domain sequence which is at least 85, 90, 95, 98, or 99%identical to the amino acid sequence of the HC variable domain of cloneM0044-A06; M0044-A11; M0044-B04; M0044-B05; M0044-B08; M0044-B09;M0044-B10; M0044-B12; M0044-C07; M0044-D01; M0044-E03; M0044-F03;M0044-F06; M0044-F09; M0044-G06; M0044-G07; M0044-G11; M0044-H03;M0044-H05; M0044-H07; M0044-H09; M0045-A02; M0045-A04; M0045-B01;M0045-B03; M0045-B11; M0045-C02; M0045-C11; M0045-C12; M0045-D01;M0045-D07; M0045-G01; M0045-G10; M0046-A11; M0046-B06; M0046-B10;M0046-G12; M0046-H03; M0046-H10; M0046-H11; M0047-B03; M0047-D01;M0047-D03; M0047-E10; M0047-G09; M0053-A02; M0053-A03; M0053-A05;M0053-A09; M0053-B09; M0053-B11; M0053-D03; M0053-D06; M0053-D12;M0053-E03; M0053-E04; M0053-E08; M0053-F04; M0053-F05; M0053-F06;M0053-F08; M0053-G04; M0053-G05; M0054-A08; M0054-B06; M0054-B08;M0054-C03; M0054-C07; M0054-E04; M0054-G01; M0054-G05; M0054-H10;M0055-A09; M0055-B11; M0055-B12; M0055-C05; M0055-C07; M0055-D03;M0055-D06; M0055-D12; M0055-E04; M0055-E06; M0055-E10; M0055-E12;M0055-F10; M0055-G02; M0055-G03; M0055-H04; M0056-A01; M0056-A06;M0056-B08; M0056-B09; M0056-C03; M0056-C04; M0056-E08; M0056-F01;M0056-F02; M0056-F10; M0056-F11; M0056-G03; M0056-G04; M0056-G08;M0056-G12; M0056-H04; M0056-H12; M0057-B05; M0057-H07; M0058-A09;M0058-D04; M0058-E09; M0058-F03; M0058-G03; M0058-H01; M0059-A02;M0059-A06; M0060-B02; M0060-H01; M0061-A03; M0061-C05; M0061-C06;M0061-F07; M0061-G12; M0061-H09; M0062-A12; M0062-B05; M0062-B07;M0062-C08; M0062-D04; M0062-E02; M0062-E03; M0062-E11; M0062-F10;M0062-G06; or M0062-H01.

In one embodiment, the protein includes the amino acid sequence of theLC variable domain sequence which is at least 85, 90, 95, 98, or 99%identical to the amino acid sequence of the LC variable domain of cloneM0044-A06; M0044-A11; M0044-B04; M0044-B05; M0044-B08; M0044-B09;M0044-B10; M0044-B12; M0044-C07; M0044-D01; M0044-E03; M0044-F03;M0044-F06; M0044-F09; M0044-C06; M0044-G07; M0044-G11; M0044-H03;M0044-H05; M0044-H07; M0044-H09; M0045-A02; M0045-A04; M0045-B01;M0045-B03; M0045-B11; M0045-C02; M0045-C11; M0045-C12; M0045-D01;M0045-D07; M0045-G01; M0045-G10; M0046-A11; M0046-B06; M0046-B10;M0046-G12; M0046-H03; M0046-H10; M0046-H11; M0047-B03; M0047-D01;M0047-D03; M0047-E10; M0047-G09; M0053-A02; M0053-A03; M0053-A05;M0053-A09; M0053-B09; M0053-B11; M0053-D03; M0053-D06; M0053-D12;M0053-E03; M0053-E04; M0053-E08; M0053-F04; M0053-F05; M0053-F06;M0053-F08; M0053-G04; M0053-G05; M0054-A08; M0054-B06; M0054-B08;M0054-C03; M0054-C07; M0054-E04; M0054-G01; M0054-G05; M0054-H10;M0055-A09; M0055-B11; M0055-B12; M0055-C05; M0055-C07; M0055-D03;M0055-D06; M0055-D12; M0055-E04; M0055-E06; M0055-E10; M0055-E12;M0055-F10; M0055-G02; M0055-G03; M0055-H04; M0056-A01; M0056-A06;M0056-B08; M0056-B09; M0056-C03; M0056-C04; M0056-E08; M0056-F01;M0056-F02; M0056-F10; M0056-F11; M0056-G03; M0056-G04; M0056-G08;M0056-G12; M0056-H04; M0056-H12; M0057-B05; M0057-H07; M0058-A09;M0058-D04; M0058-E09; M0058-F03; M0058-G03; M0058-H01; M0059-A02;M0059-A06; M0060-B02; M0060-H01; M0061-A03; M0061-C05; M0061-C06;M0061-F07; M0061-G12; M0061-H09; M0062-A12; M0062-B05; M0062-B07;M0062-C08; M0062-D04; M0062-E02; M0062-E03; M0062-E11; M0062-F10;M0062-G06; or M0062-H01.

An antibody or other binding protein (e.g., a Tie1-binding protein,Tie2-binding protein, or Ang binding protein) described herein can beadministered to a subject or used in vitro in non-derivatized orunconjugated forms. In other embodiments, the binding protein can bederivatized, modified or linked to another functional molecule, e.g.,another protein (e.g., HSA, an Fc domain, etc.), a polymer (e.g., PEG)isotope, cell, or insoluble support. For example, the binding proteincan be functionally linked (e.g., by chemical coupling, genetic fusion,non-covalent association or otherwise) to one or more other molecularentities, such as an antibody (e.g., if the protein is an antibody toform a bispecific or a multi-specific antibody), a toxin, aradioisotope, a therapeutic (e.g., a cytotoxic or cytostatic) agent ormoiety, among others. For example, the binding protein can be coupled toa radioactive ion (e.g., an α-, γ-, or β-emitter), e.g., iodine (¹³¹I or¹²⁵I), yttrium (⁹⁰Y), lutetium (¹⁷⁷Lu), actinium (²²⁵Ac), rhenium(¹⁸⁶Re), or bismuth (²¹²Bi or ²¹³Bi).

In another aspect, the invention features a nucleic acid that includes acoding sequence that encodes a polypeptide comprising an immunoglobulinheavy or light chain variable domain that binds to Tie1, e.g., animmunoglobulin heavy or light chain variable domain described herein.For example, the nucleic acid can include a particular nucleic acidsequence described herein, a nucleic acid that is at least 75, 80, 85,90, 95, 96, 97, 98, or 99% identical to a nucleic acid sequencedescribed herein (e.g., a particular nucleic acid sequence), or anucleic acid that specifically hybridizes (e.g., under conditionsdescribed herein, e.g., high stringency conditions) to a nucleic acidsequence described herein (e.g., a particular nucleic acid sequence,e.g., a nucleic acid encoding one or more variable domains of M0044-A06;M0044-A11; M0044-B04; M0044-B05; M0044-B08; M0044-B09; M0044-B10;M0044-B12; M0044-C07; M0044-D01; M0044-E03; M0044-F03; M0044-F06;M0044-F09; M0044-G06; M0044-G07; M0044-G11; M0044-H03; M0044-H05;M0044-H07; M0044-H09; M0045-A02; M0045-A04; M0045-B01; M0045-B03;M0045-B11; M0045-C02; M0045-C11; M0045-C12; M0045-D01; M0045-D07;M0045-G01; M0045-G10; M0046-A11; M0046-B06; M0046-B10; M0046-G12;M0046-H03; M0046-H10; M0046-H11; M0047-B03; M0047-D01; M0047-D03;M0047-E10; M0047-G09; M0053-A02; M0053-A03; M0053-A05; M0053-A09;M0053-B09; M0053-B11; M0053-D03; M0053-D06; M0053-D12; M0053-E03;M0053-E04; M0053-E08; M0053-F04; M0053-F05; M0053-F06; M0053-F08;M0053-G04; M0053-G05; M0054-A08; M0054-B06; M0054-B08; M0054-C03;M0054-C07; M0054-E04; M0054-G01; M0054-G05; M0054-H10; M0055-A09;M0055-B11; M0055-B12; M0055-C05; M0055-C07; M0055-D03; M0055-D06;M0055-D12; M0055-E04; M0055-E06; M0055-E10; M0055-E12; M0055-F10;M0055-G02; M0055-G03; M0055-H04; M0056-A01; M0056-A06; M0056-B08;M0056-B09; M0056-C03; M0056-C04; M0056-E08; M0056-F01; M0056-F02;M0056-F10; M0056-F11; M0056-G03; M0056-G04; M0056-C08; M0056-G12;M0056-H04; M0056-H12; M0057-B05; M0057-H07; M0058-A09; M0058-D04;M0058-E09; M0058-F03; M0058-G03; M0058-H01; M0059-A02; M0059-A06;M0060-B02; M0060-H01; M0061-A03; M0061-C05; M0061-C06; M0061-F07;M0061-G12; M0061-H09; M0062-A12; M0062-B05; M0062-B07; M0062-C08;M0062-D04; M0062-E02; M0062-E03; M0062-E11; M0062-F10; M0062-G06; orM0062-H01), or fragments thereof (e.g., CDR-coding fragments).

A nucleic acid described herein can further include a promoter operablylinked to the coding sequence. A nucleic acid can include a first andsecond coding sequence, e.g., wherein the first coding sequence encodesa polypeptide that includes an immunoglobulin heavy chain variabledomain and the second coding sequence encodes a polypeptide thatincludes an immunoglobulin light chain variable domain.

In another aspect, the invention features a host cell that contains afirst nucleic acid encoding a polypeptide comprising a heavy chainvariable region and a second nucleic acid encoding a polypeptidecomprising a light chain variable region. The heavy chain variableregion and the light chain variable region can associate to form a Tie1binding protein. These variable regions can have one or more propertiesdescribed herein, e.g., at least 75, 80, 85, 90, 95, 96, 97, 98, or 99%identity to a sequence described herein. The invention also includes amethod of providing a Tie1-binding antibody. The method can includeproviding a host cell described herein; and expressing said first andsecond nucleic acids in the host cell under conditions that allowassembly of said light and heavy chain variable regions to form anantigen binding protein that interacts with Tie1.

In another aspect, the invention provides compositions, e.g.,pharmaceutical compositions, which include a pharmaceutically acceptablecarrier, excipient or stabilizer, and at least one of the Tie1-bindingproteins (e.g., antibodies or fragments thereof) described herein. Inone embodiment, the compositions, e.g., the pharmaceutical compositions,include a combination of two or more of the aforesaid Tie1-bindingproteins.

In another aspect, the invention features a kit that includes aTie1-binding antibody (or fragment thereof), e.g., a Tie1-bindingantibody (or fragment thereof) as described herein, for use alone or incombination with other therapeutic modalities, e.g., a cytotoxic orlabeling agent, e.g., a cytotoxic or labeling agent as described herein,along with instructions on how to use the Tie1 antibody or thecombination of such agents to treat, prevent or detect a Tie1-relateddisorder, e.g., an endothelial cell related disorder, e.g., rheumatoidarthritis or metastatic cancer.

In another aspect, the binding protein that binds to Tie1 is apolypeptide that is not an immunoglobulin. For example, the polypeptidecan be of variable length, e.g., 4 to 100 amino acid residues in length,preferably 5 to 75, 6 to 50, or 7 to 40 amino acid residues in length,or more preferably 8 to 30 or 10 to 25 amino acid residues in length. Insome embodiments, the polypeptide includes non-standard or syntheticamino acid residues, e.g., norleucine, selenocysteine, pyrrolysine, etc.In some embodiments, the polypeptide includes cross-linking groups,e.g., two cysteine residues that can form a disulfide bond or some othertype of chemical cross-linking moieties that can be used to cyclize thepeptide. In other preferred embodiments, the polypeptide can bemodified, e.g., using polyethylene glycol or fusion to a solubleprotein, e.g., to increase the solubility or circulatory half-life ofthe polypeptide.

The target-binding protein can be physically associated with (e.g.,fused to) another protein, e.g., a protein that does not bind to thetarget, e.g., to the amino or carboxy terminus. For example, thetarget-binding protein can be associated with (e.g., fused to) a proteinthat increases serum residence or alters stability, e.g., an albumin,e.g., a serum albumin, e.g., HSA (human serum albumin). In anotherexample, the target binding protein is physically associated with (e.g.,fused to) a moiety that facilitates purification, e.g., a purificationtag such as His, PEG, or to a functional moiety, e.g., Fc.

In another aspect, the invention features a method of identifying aprotein that specifically binds to Tie1. In preferred embodiments, theinvention includes: providing a Tie1 antigen; providing a displaylibrary (e.g., a phage display library member); identifying a memberpresent in the library, wherein the member expresses a protein thatspecifically binds to the Tie1 antigen. The term “Tie1 antigen” refersto any antigenic fragment of Tie1 that is at least 8 amino acids inlength. For example, a Tie1 antigen can include a fragment of the Tie1ectodomain, e.g., a fragment that includes a folded protein domain suchas a fragment described herein. In some embodiments, the Tie1 antigen isof human origin and includes, e.g., the extracellular domain of humanTie1 or a fragment thereof (e.g., a fragment described herein. The Tie1antigen can be a recombinant polypeptide optionally fused to anotherpolypeptide, e.g., a Fc domain, or it can be a cell that expresses Tie1on its surface (e.g., an endothelial cell). In other preferredembodiments, the Tie1 antigen has an activated conformation, e.g., theTie1 antigen is a dimeric conformation or a conformation stabilized bythe E3 or E3b antibody described herein.

The methods described here are, for example, applicable to librariesthat are based on bacteriophage with a substantially complete genome(e.g., including a modified gene III) and to libraries that are based onbacteriophage particles that include a phagemid nucleic acid. The terms“bacteriophage library member” and “phage” encompass members of bothtypes of libraries. The term “bacteriophage particle” refers to aparticle formed of bacteriophage coat proteins that packages a nucleicacid. The packaged nucleic acid can be a modified bacteriophage genomeor a phagemid, e.g., a nucleic acid that includes a bacteriophage originof replication but lacks essential phage genes and cannot propagate inE. coli without help from “helper phage” or phage genes supplied intrans.

In other embodiments, the invention features a method of identifying aprotein that specifically binds to Tie1. The method includes: providinga Tie1 antigen (e.g., an region of the Tie1 ectodomain); immunizing anon-human animal with the Tie1 antigen; and isolating a cell thatproduces a immunoglobulin that interacts with Tie1. For example, themethod can include producing hybridoma cells from the spleen of theanimal (e.g., an immunized mouse); and identifying individual hybridomacell lines expressing an antibody that specifically binds to the Tie1antigen. For example, the

In preferred embodiments, the Tie1 antigen is of human origin andincludes, e.g., the extracellular domain of human Tie1 or some fragmentthereof, e.g., the HA binding domain of Tie1. The Tie1 antigen can be arecombinant polypeptide optionally fused to another polypeptide, e.g., apurification handle, or it can be a cell that expresses Tie1 (e.g., anendothelial cell) on its surface. In other preferred embodiments, theTie1 antigen has an activated conformation, e.g., dimerized.

In preferred embodiments, the methods further include isolating anucleic acid molecule from the identified phage or hybridoma, whereinthe nucleic acid molecule encodes the polypeptide or antibody thatspecifically binds to the Tie1 antigen. The isolated nucleic acidmolecules can be used to produce therapeutic agents, as describedherein.

In another aspect, the invention features nucleic acids that encodeproteins identified by the methods described herein. In preferredembodiments, the nucleic acids include sequences encoding a heavy andlight chain immunoglobulin or immunoglobulin fragment described herein.For example, the invention features, a first and second nucleic acidencoding a heavy and light chain variable region, respectively, of aTie1-binding antibody molecule as described herein. Sequences encoding aheavy and light chain that function together can be present on separatenucleic acid molecules or on the same nucleic acid molecule. In anotheraspect, the invention features host cells and vectors containing anucleic acid described herein.

In yet another aspect, the invention features a method of producing aTie1-binding antibody, or antigen-binding fragment thereof The methodincludes: providing a host cell that contains a first nucleic acidencoding a polypeptide comprising a heavy chain variable region, e.g., aheavy chain variable region as described herein; providing a secondnucleic acid encoding a polypeptide comprising a light chain variableregion, e.g., a light chain variable region as described herein; andexpressing said first and second nucleic acids in the host cell underconditions that allow assembly of said light and heavy chain variableregions to form an antigen binding protein that interacts with Tie1. Thefirst and second nucleic acids can be linked or unlinked, e.g.,expressed on the same or different vector, respectively. The first andsecond nucleic acids can be components of the same molecule or canreside on different molecules (e.g., different chromosomes or plasmids).

The host cell can be a eukaryotic cell, e.g., a mammalian cell, aninsect cell, a yeast cell, or a prokaryotic cell, e.g., E. coli. Forexample, the mammalian cell can be a cultured cell or a cell line.Exemplary mammalian cells include lymphocytic cell lines (e.g., NS0),Chinese hamster ovary cells (CHO), COS cells, HEK294, oocyte cells, andcells from a transgenic animal, e.g., mammary epithelial cell. Forexample, nucleic acids encoding the antibodies described herein can beexpressed in a transgenic animal. In one embodiment, the nucleic acidsare placed under the control of a tissue-specific promoter (e.g., amammary specific promoter) and the antibody is produced in thetransgenic animal. For example, the antibody molecule is secreted intothe milk of the transgenic animal, such as a transgenic cow, pig, horse,sheep, goat or rodent. To produce a single chain antibody, the nucleicacid is configured to encode a single polypeptide that comprises boththe heavy and light chain variable domains.

Tie1 has been found to be overexpressed in association with a wide rangeof cancers. Targeting Tie1 on the tumor vasculature with Tie1-bindingproteins (e.g., antibodies) can be used to inhibit, destroy, orotherwise antagonize the vasculature so that tumor growth and metastasisis reduced. The proteins can be, for example, associated with a toxicpayload or can mediate direct functional inhibition. Proteins (e.g.,proteins that have an Fc domain) that can cause ADCC can also be used.

In another aspect, the invention features a method of inhibiting anactivity of a cell, e.g., an endothelial cell, e.g., proliferation,adhesion, growth or survival of a cell, e.g., an endothelial cell, e.g.,an endothelial cell in the vicinity of a cancer, e.g., a tumor.Exemplary methods include contacting the cell with a Tie1 bindingprotein, in an amount sufficient to inhibit the adhesion, migration,growth or proliferation of the cell. Methods of administering a Tie1binding protein can be used, for example, to treat or prevent adisorder, e.g., an inflammatory disorder (e.g., rheumatoid arthritis,lupus, restenosis, psoriasis, graft v. host response, or multiplesclerosis), or a cancerous disorder (e.g., a malignant or metastaticdisorder), by administering to a subject (e.g., an experimental animalor a human patient) a Tie1-binding protein in an amount effective totreat or prevent such disorder.

A Tie1-binding protein can be used to treat or preventangiogenesis-related disorders, particularly angiogenesis-dependentcancers and tumors. Angiogenesis-related disorders include, but are notlimited to, solid tumors; tumor metastasis; benign tumors (e.g.,hemangiomas, acoustic neuromas, neurofibromas, trachomas, and pyogenicgranulomas; rheumatoid arthritis); psoriasis; ocular angiogenicdiseases, for example, diabetic retinopathy, retinopathy of prematurity,macular degeneration, corneal graft rejection, neovascular glaucoma,retrolental fibroplasia, rubeosis; Osler-Webber Syndrome; myocardialangiogenesis; plaque neovascularization; telangiectasia; hemophiliacjoints; angiofibroma; and wound granulation.

“Angiogenesis-dependent cancers and tumors” are cancers tumors thatrequire, for their growth (expansion in volume and/or mass), an increasein the number and density of the blood vessels supplying then withblood. In one embodiment a Tie1-binding protein causes regression ofsuch cancers and tumors. “Regression” refers to the reduction of tumormass and size, e.g., a reduction of at least 2, 5, 10, or 25%.

In addition, Tie1 and Tie2 are also expressed in hematopoietic cells.(Kukk et al (1997) Br. J. Haematol. 98: 195; Iwama et al (1993) Biochem.Biophys. Res. Commun. 195: 301). Accordingly, in another embodiment, aTie1-binding protein is used to treat hematopoietic conditions, e.g.,hematopoietic cancers. Examples of hematopoietic cancers include:cancers derived from hyperplastic/neoplastic cells of hematopoieticorigin, e.g., cells arising from myeloid, lymphoid or erythroidlineages, or precursor cells thereof. Exemplary cancers include acutepromyeloid leukemia (APML), acute myelogenous leukemia (AML), chronicmyelogenous leukemia (CML), acute lymphoblastic leukemia (ALL), chroniclymphocytic leukemia (CLL), prolymphocytic leukemia (PLL), hairy cellleukemia (HLL) and Waldenstrom's macroglobulinemia (WM), non-Hodgkin'slymphoma, peripheral T-cell lymphomas, adult T-cell leukemia/lymphoma(ATL), cutaneous T-cell lymphoma (CTCL), large granular lymphocyticleukemia (LGF), B cell chronic lymphocytic leukemia, myelodysplasticsyndrome, and Hodgkin's disease.

In another aspect, the invention features a method of contacting a cell(in vitro, ex vivo, or in vivo), e.g., an endothelial cell, e.g., anendothelial cell in the vicinity of a cancer, e.g., a tumor. The methodcan include providing an agent (e.g., a protein) that interacts withTie1, e.g., a protein described herein, and contacting the cell with theprotein, in an amount sufficient to form at least one detectableligand-cell complex. The protein can include, for example, a label orcytotoxic entity, e.g., an immunoglobulin Fc domain or a cytotoxic drug.

In another aspect, the invention features administering the agentdescribed herein as an adjuvant therapy, e.g., to a subject. Theadjuvant therapy can be a post-operative therapy that is administered tothe subject after the subject has undergone surgery to remove all orpart of a tumor (e.g., after surgery to treat glioblastoma orcolorectal, breast, or lung cancer). For example, the agent is a proteinthat inhibits Tie complex formation, promotes Tie1 homodimerization, orincreases Tie1 phosphorylation. For example, the agent is a protein thatbinds Tie1 (e.g., an anti-Tie1 antibody). In one embodiment, the agentis administered within 6, 12, 24, 48, or 100 hours of surgery. The agentcan be administered before as well as after surgery.

An exemplary agent is a Tie1 binding agent that includes (a) a heavychain variable domain sequence that is at least 85, 90, 95, 98, 99%, or100% identical to the heavy chain variable domain of the E3 antibody anda light chain variable domain sequence that is at least 85, 90, 95, 98,99%, or 100% identical to the light chain variable domain of the E3antibody; (b) a heavy chain variable domain sequence and a light chainvariable domain sequence that form an antigen binding site that competeswith E3 for binding to Tie1; or (c) one, two, or three, of the CDRs ofthe heavy chain variable domain of the E3 antibody, and one, two, orthree of the CDRs of the light chain variable domain of the E3 antibody.Other Tie1 binding agents described herein can also be used, e.g., aTie1 binding agent that includes a heavy chain variable domain sequencethat is at least 85, 90, 95, 98, 99%, or 100% identical to the heavychain variable domain of M0059A02, M0045A02*, M0054G05, M0053F05,M0053G05, M0061C06, M0045B01, M0046G12, M0046H11, M0053A02, M0053A05,M0046B06, M0044B10, M0044B08, M0056G08, M0045B03, M0053F04, M0055E10,M0060H01, M0054H10, or M0058F03, and a light chain variable domainsequence that is at least 85, 90, 95, 98, 99%, or 100% identical to thelight chain variable domain of M0059A02, M0045A02*, M0054G05, M0053F05,M0053G05, M0061C06, M0045B01, M0046G12, M0046H11, M0053A02, M0053A05,M0046B06, M0044B10, M0044B08, M0056G08, M0045B03, M0053F04, M0055E10,M0060H01, M0054H10, or M0058F03.

In another aspect, the invention features a method of treating, e.g.,inhibiting, ablating or killing, a cell or impairing at least oneactivity of the cell. The method includes providing a Tie1-bindingprotein, e.g. a ligand described herein, and contacting the cell withthe protein, in an amount sufficient to impair at least one activity ofthe cell, inhibit, ablate or kill the cell. The contacting can be invitro or in vivo. For example, the cell can be, e.g., an endothelialcell, e.g., an endothelial cell in the vicinity of a cancer, e.g., atumor. The protein can include a cytotoxic entity. Methods ofadministering a Tie1 binding protein or other agent described herein canbe used, for example, to treat or prevent a disorder, e.g., aendothelial cell-based disorder, a blood vessel disorder, wound healing,or a cancerous disorder (e.g., a malignant or metastatic disorder), byadministering to a subject (e.g., an experimental animal or a humanpatient) a Tie1-binding protein in an amount effective to treat orprevent such disorder.

A Tie1 binding protein or other agent described herein can be used oncells in culture, e.g. in vitro or ex vivo. For example, an endothelialcell, e.g., an endothelial cell in cancer biopsy, can be cultured invitro in culture medium and the contacting step can be effected byadding the Tie1-binding protein to the culture medium. The method can beperformed on cells (e.g., cancerous or metastatic cells) present in asubject, as part of an in vivo (e.g., therapeutic or prophylactic)protocol. For in vivo embodiments, the contacting step is effected in asubject and includes administering the Tie1-binding protein to thesubject under conditions effective to permit both binding of the proteinto the cell, and the inhibition of adhesion, migration, growth orproliferation of the cell.

A Tie1 binding protein or other agent described herein can be used totreat or prevent cancerous disorders, e.g., including hematopoieticcancers, solid tumors, soft tissue tumors, and metastatic lesions,particularly tumors that require a blood supply or angiogenesis.Examples of solid tumors include malignancies, e.g., sarcomas,adenocarcinomas, and carcinomas, of the various organ systems, such asthose affecting lung, breast, lymphoid, gastrointestinal (e.g., colon),and genitourinary tract (e.g., renal, urothelial cells), pharynx, aswell as adenocarcinomas which include malignancies such as most coloncancers, rectal cancer, renal-cell carcinoma, liver cancer, non-smallcell carcinoma of the lung, cancer of the small intestine and cancer ofthe esophagus. The subject can be a mammal, e.g., a primate, preferablya higher primate, e.g., a human (e.g., a patient having, or at risk of,a disorder described herein, e.g., an endothelial cell-based disorder,e.g., cancer).

The Tie1-binding antibody or fragment thereof, e.g., a Tie1-bindingantibody or fragment thereof as described herein, can be administered tothe subject systemically (e.g., orally, parenterally, subcutaneously,intravenously, intramuscularly, intraperitoneally, intranasally,transdermally, or by inhalation), topically, or by application to mucousmembranes, such as the nose, throat and bronchial tubes.

The methods can further include the step of monitoring the subject,e.g., for a reduction in one or more of: a reduction in tumor size;reduction in cancer markers, e.g., levels of cancer specific antigen;reduction in the appearance of new lesions, e.g., in a bone scan; areduction in the appearance of new disease-related symptoms; ordecreased or stabilization of size of soft tissue mass; or any parameterrelated to improvement in clinical outcome. The subject can be monitoredin one or more of the following periods: prior to beginning oftreatment; during the treatment; or after one or more elements of thetreatment have been administered. Monitoring can be used to evaluate theneed for further treatment with the same Tie1-binding protein or foradditional treatment with additional agents. Generally, a decrease inone or more of the parameters described above is indicative of theimproved condition of the subject. Information about the monitoring canbe recorded, e.g., in electronic or digital form.

The Tie1-binding protein can be used alone in unconjugated form tothereby inhibit adhesion, migration, or extravasation or theTie1-expressing cells, or ablate or kill the Tie1-expressing cells. Ifthe Tie1-binding protein is an antibody, the ablation or killing can bemediated, e.g., by an antibody-dependent cell killing mechanisms such ascomplement-mediated cell lysis and/or effector cell-mediated cellkilling. In other embodiments, the Tie1-binding protein can be bound(e.g., physically associated, either directly or indirectly, covalentlyor non-covalently) to a substance, e.g., a cytotoxic agent or moiety,effective to kill or ablate the Tie1-expressing cells. For example, theTie1-binding protein can be coupled to a radioactive ion (e.g., an α-,γ-, or β-emitter), e.g., iodine (¹³¹I or ¹²⁵I), yttrium (⁹⁰Y), lutetium(¹⁷⁷Lu), actinium (²²⁵Ac), or bismuth (²¹²Bi or ²¹³Bi).

The methods and compositions described herein can be used in combinationwith other therapeutic modalities. In one embodiment, the methodsinclude administering to the subject a Tie1-binding protein, e.g., aTie1-binding antibody or fragment thereof, in combination with acytotoxic agent, in an amount effective to treat or prevent thedisorder. The Tie1-binding protein and the cytotoxic agent can beadministered simultaneously or sequentially. In other embodiments, aTie1 binding protein or other agent described herein is used incombination with surgical and/or radiation procedures.

In another aspect, the invention features methods for detecting thepresence of a Tie1 protein or a cell expressing Tie1 (e.g., anendothelial cell) in a sample, in vitro (e.g., a biological sample, atissue biopsy, e.g., a cancerous lesion). The subject method can be usedto evaluate, e.g., diagnose or stage a disorder described herein, e.g.,a cancerous disorder. The method includes: (i) contacting the sample(and optionally, a reference, e.g., control sample) with a Tie1-bindingprotein, as described herein, under conditions that allow interaction ofthe Tie1-binding protein and the Tie1 protein to occur; and (ii)detecting formation of a complex between the Tie1-binding protein, andthe sample (and optionally, the reference, e.g., control, sample).Formation of the complex is indicative of the presence of Tie1 protein(e.g., activated Tie1 protein), and can indicate the suitability or needfor a treatment described herein. For example, a statisticallysignificant change in the formation of the complex in the samplerelative to the reference sample, e.g., the control sample, isindicative of the presence of Tie1 (e.g., activated Tie1) in the sample.

In yet another aspect, the invention provides a method for detecting thepresence of Tie1 (e.g., activated Tie1) in vivo (e.g., in vivo imagingin a subject). The subject method can be used to evaluate, e.g.,diagnose, localize, or stage a disorder described herein, e.g., acancerous disorder. The method includes: (i) administering to a subject(and optionally a control subject) a Tie1-binding protein (e.g., anantibody or antigen binding fragment thereof), under conditions thatallow interaction of the Tie1-binding protein and the Tie1 protein tooccur; and (ii) detecting formation of a complex between theTie1-binding protein and Tie1, wherein a statistically significantchange in the formation of the complex in the subject relative to thereference, e.g., the control subject or subject's baseline, isindicative of the presence of the Tie1. The presence of Tie1 inparticular locations within a subject can be indicative of anendothelial-cell related disorder, e.g., an angiogenesis-relateddisorder, e.g., a cancer, e.g., metastatic cancer, or otherangiogenesis-related disorder described herein.

Tumor cells can express Tie1. In one aspect, the invention features amethod of providing a sample from a subject and evaluating the Tie1expression in cells in the sample. In one embodiment, the result ofevaluating Tie1 expression levels is compared to a reference, e.g., areference value or reference quality. For example, the Tie1 expressionon the evaluated sample may have the same, less than, or greater thanthe reference value. A reference value or quality can be determinedusing a control sample, a statistical value (e.g., an average, median,etc.) or an arbitrary value. For example, the control sample can be anormal sample, e.g., a sample devoid of tumor cells from the same ordifferent subject. A change (e.g., an increase) relative to thereference can indicate that the sample includes tumor cells, e.g., thesubject may be indicated as having a tumor.

In other embodiments, a method of diagnosing or staging a disorder asdescribed herein (e.g., an inflammatory or cancerous disorder), isprovided. The method includes: (i) identifying a subject having, or atrisk of having, the disorder; (ii) obtaining a sample of a tissue orcell affected with the disorder; (iii) contacting said sample or acontrol sample with a Tie1-binding protein, under conditions that allowinteraction of the binding agent and the Tie1 protein to occur, and (iv)detecting formation of a complex. A statistically significant increasein the formation of the complex between the Tie1-binding protein withrespect to a reference sample, e.g., a control sample, is indicative ofthe disorder or the stage of the disorder. For example, the finding ofactivated Tie1 on tumor cells located in a solid tumor can indicate thatthe tumor is progressing into a metastatic tumor.

Preferably, the Tie1-binding protein used in the in vivo and in vitrodiagnostic methods is directly or indirectly labeled with a detectablesubstance to facilitate detection of the bound or unbound binding agent.Suitable detectable substances include various enzymes, prostheticgroups, fluorescent materials, luminescent materials and radioactivematerials. In one embodiment, the Tie1-binding protein is coupled to aradioactive ion, e.g., indium (¹¹¹In), iodine (¹³¹I or ¹²⁵I), yttrium(⁹⁰Y), actinium (²²⁵Ac), bismuth (²¹²Bi or ²¹³Bi), sulfur (³⁵S), carbon(¹⁴C), tritium (³H), rhodium (¹⁸⁸Rh), or phosphorous (³²P). In anotherembodiment, the Tie1-binding protein is labeled with an NMR contrastagent.

In one aspect, the invention features a method of imaging tumorvasculature, the method includes: providing a protein that binds toTie1, Tie2, or Ang, e.g., a protein described herein, wherein theprotein is physically associated to an imaging agent; administering theprotein to a patient, e.g., with a tumor; and imaging the patient, e.g.,to detect tumor vasculature.

In one aspect, the invention features a method of treating a subjectwith a blood born neoplastic disorder, the method includes administeringa protein that binds to Tie1, Tie2, or Ang, e.g., a protein describedherein, to a subject with a blood born neoplastic disorder (e.g., aproliferative disorder of hematopoietic cells, e.g., leukemia), therebytreating the disorder.

In one aspect, the invention features a method of diagnosing andtreating a subject, the method includes evaluating a parameterassociated with Tie1, Tie2, or Ang in a subject; and, if the parameteris altered relative to a reference, administering a protein describedherein to the subject, thereby treating the subject. In one embodiment,the parameter includes a value indicative of protein or mRNA levels,e.g., in a tissue of a subject. In one embodiment, the referenceincludes a value determined for a reference subject, e.g., an age/gendermatched subject, e.g., a control or normal subject.

In one aspect, the invention features a method of treating a subject,the method includes: administering a protein described herein to asubject that has elevated Tie1, Tie2, or Ang biomolecules or activityrelative to a reference. The method can include evaluating the subject,e.g., to determine if the subject has elevated Tie1, Tie2, or Angbiomolecules or activity relative to a reference. In one embodiment, thesubject has elevated Tie1 protein or mRNA levels.

The invention also provides polypeptides and nucleic acids thatencompass a range of amino acid and nucleic acid sequences, e.g.,sequences described herein or sequences related to those describedherein. For example, the invention features nucleic acids that encodeseach of the polypeptides described herein. The nucleic acid can includethe cognate codons or any set of codons that can be translated toproduce the respective polypeptide. Such polypeptides include individualsubunits of a multi-chain protein, e.g., an antibody that includes aplurality of different polypeptide chains. The nucleic acid may also bea nucleic acid fragment or vector that is not expressed, but includes asequence encoding at least a part of an immunoglobulin variable region(e.g., including a CDR described herein) or a complement thereof. Suchnucleic acids can be used to prepare useful constructs, cells, andproteins. In addition, the invention features a host cell that includesa nucleic acid described herein. The cell can express a proteindescribed herein, e.g., on its surface. The invention also includes areproteins that include an amino acid sequence encoded by a nucleic aciddescribed herein or that hybridize to a nucleic acid described herein.

As used herein, the term “antibody” refers to a protein that includes atleast one immunoglobulin variable domain or immunoglobulin variabledomain sequence. For example, an antibody can include a heavy (H) chainvariable region (abbreviated herein as VH), and a light (L) chainvariable region (abbreviated herein as VL). In another example, anantibody includes two heavy (H) chain variable regions and two light (L)chain variable regions. The term “antibody” encompasses antigen-bindingfragments of antibodies (e.g., single chain antibodies, Fab fragments,F(ab′)₂, a Fd fragment, a Fv fragments, and dAb fragments) as well ascomplete antibodies.

The VH and VL regions can be further subdivided into regions ofhypervariability, termed “complementarity determining regions” (CDR),interspersed with regions that are more conserved, termed “frameworkregions” (FR). The extent of the framework region and CDRs has beenprecisely defined (see, Kabat, E. A., et al. (1991) Sequences ofProteins of Immunological Interest, Fifth Edition, U.S. Department ofHealth and Human Services, NIH Publication No. 91-3242, and Chothia, C.et al. (1987) J. Mol. Biol. 196:901-917). Kabat definitions are usedherein. Each VH and VL is typically composed of three CDRs and four FRs,arranged from amino-terminus to carboxy-terminus in the following order:FR1, CDR1, FR2, CDR2, FR3, CDR3, FR4.

An “immunoglobulin domain” refers to a domain from the variable orconstant domain of immunoglobulin molecules. Immunoglobulin domainstypically contain two β-sheets formed of about seven β-strands, and aconserved disulphide bond (see, e.g., A. F. Williams and A. N. Barclay1988 Ann. Rev Immunol. 6:381-405). The canonical structures ofhypervariable loops of an immunoglobulin variable can be inferred fromits sequence, as described in Chothia et al. (1992) J. Mol. Biol.227:799-817; Tomlinson et al. (1992) J. Mol. Biol. 227:776-798); andTomlinson et al. (1995) EMBO J. 14(18):4628-38.

As used herein, an “immunoglobulin variable domain sequence” refers toan amino acid sequence which can form the structure of an immunoglobulinvariable domain. For example, the sequence may include all or part ofthe amino acid sequence of a naturally-occurring variable domain. Forexample, the sequence may omit one, two or more N- or C-terminal aminoacids, internal amino acids, may include one or more insertions oradditional terminal amino acids, or may include other alterations. Inone embodiment, a polypeptide that includes immunoglobulin variabledomain sequence can associate with another immunoglobulin variabledomain sequence to form a target binding structure (or “antigen bindingsite”), e.g., a structure that interacts with Tie1, e.g., binds to orinhibits Tie1.

The VH or VL chain of the antibody can further include all or part of aheavy or light chain constant region, to thereby form a heavy or lightimmunoglobulin chain, respectively. In one embodiment, the antibody is atetramer of two heavy immunoglobulin chains and two light immunoglobulinchains, wherein the heavy and light immunoglobulin chains areinter-connected by, e.g., disulfide bonds. The heavy chain constantregion includes three domains, CH1, CH2 and CH3. The light chainconstant region includes a CL domain. The variable region of the heavyand light chains contains a binding domain that interacts with anantigen. The constant regions of the antibodies typically mediate thebinding of the antibody to host tissues or factors, including variouscells of the immune system (e.g., effector cells) and the firstcomponent (Clq) of the classical complement system. The term “antibody”includes intact immunoglobulins of types IgA, IgG, IgE, IgD, IgM (aswell as subtypes thereof). The light chains of the immunoglobulin may beof types kappa or lambda. In one embodiment, the antibody isglycosylated. An antibody can be functional for antibody-dependentcytotoxicity and/or complement-mediated cytotoxicity.

One or more regions of an antibody can be human or effectively human.For example, one or more of the variable regions can be human oreffectively human. For example, one or more of the CDRs can be human,e.g., HC CDR1, HC CDR2, HC CDR3, LC CDR1, LC CDR2, and LC CDR3. Each ofthe light chain CDRs can be human. HC CDR3 can be human. One or more ofthe framework regions can be human, e.g., FR1, FR2, FR3, and FR4 of theHC or LC. In one embodiment, all the framework regions are human, e.g.,derived from a human somatic cell, e.g., a hematopoietic cell thatproduces immunoglobulins or a non-hematopoietic cell. In one embodiment,the human sequences are germline sequences, e.g., encoded by a germlinenucleic acid. One or more of the constant regions can be human oreffectively human. In another embodiment, at least 70, 75, 80, 85, 90,92, 95, or 98% of the framework regions (e.g., FR1, FR2, and FR3,collectively, or FR1, FR2, FR3, and FR4, collectively) or the entireantibody can be human or effectively human. For example, FR1, FR2, andFR3 collectively can be at least 70, 75, 80, 85, 90, 92, 95, 98, or 99%identical to a human sequence encoded by a human germline V segment of alocus encoding a light or heavy chain sequence.

All or part of an antibody can be encoded by an immunoglobulin gene or asegment thereof. Exemplary human immunoglobulin genes include the kappa,lambda, alpha (IgA1 and IgA2), gamma (IgG1, IgG2, IgG3, IgG4), delta,epsilon and mu constant region genes, as well as the myriadimmunoglobulin variable region genes. Full-length immunoglobulin lightchains (about 25 Kd or 214 amino acids) are encoded by a variable regiongene at the NH2-terminus (about 110 amino acids) and a kappa or lambdaconstant region gene at the COOH-terminus. Full-length immunoglobulinheavy chains (about 50 Kd or 446 amino acids), are similarly encoded bya variable region gene (about 116 amino acids) and one of the otheraforementioned constant region genes, e.g., gamma (encoding about 330amino acids). A light chain refers to any polypeptide that includes alight chain variable domain. A heavy chain refers to any polypeptidethat a heavy chain variable domain.

The term “antigen-binding fragment” of a full-length antibody (or simply“antibody portion,” or “fragment”), as used herein, refers to one ormore fragments of a full-length antibody that retain the ability tospecifically bind to a target of interest. Examples of binding fragmentsencompassed within the term “antigen-binding fragment” of a full lengthantibody include (i) a Fab fragment, a monovalent fragment consisting ofthe VL, VH, CL and CH1 domains; (ii) a F(ab′)₂ fragment, a bivalentfragment including two Fab fragments linked by a disulfide bridge at thehinge region; (iii) a Fd fragment consisting of the VH and CH1 domains;(iv) a Fv fragment consisting of the VL and VH domains of a single armof an antibody, (v) a dAb fragment (Ward et al., (1989) Nature341:544-546), which consists of a VH domain; and (vi) an isolatedcomplementarity determining region (CDR) that retains functionality.Furthermore, although the two domains of the Fv fragment, VL and VH, arecoded for by separate genes, they can be joined, using recombinantmethods, by a synthetic linker that enables them to be made as a singleprotein chain in which the VL and VH regions pair to form monovalentmolecules known as single chain Fv (scFv). See e.g., Bird et al. (1988)Science 242:423-426; and Huston et al. (1988) Proc. Natl. Acad. Sci. USA85:5879-5883.

Antibody fragments can be obtained using any appropriate techniqueincluding conventional techniques known to those with skill in the art.The term “monospecific antibody” refers to an antibody that displays asingle binding specificity and affinity for a particular target, e.g.,epitope. This term includes a “monoclonal antibody” or “monoclonalantibody composition,” which as used herein refer to a preparation ofantibodies or fragments thereof of single molecular composition. As usedherein, “isotype” refers to the antibody class (e.g., IgM or IgG1) thatis encoded by heavy chain constant region genes.

In one embodiment, the HC or LC of an antibody includes sequences thatcorrespond to an amino acid sequence encoded by a human germlinesequence, e.g., the framework regions and/or in the CDRs. For example,the antibody can include sequences from the human DP47 antibody. In oneembodiment, one or more codons for the antibody are altered relative tothe germline nucleic acid sequence, but are chosen to encode the sameamino acid sequence. Codons can be selected, e.g., to optimizeexpression in a particular system, create restriction enzyme sites,create a silent fingerprint, etc.

In one embodiment, CDR2 of the antibody HC includes at least 11, 12, 13,14, or 15 amino acid positions that are identical to the amino acidsfound in CDR2 of DP47.

A “humanized” immunoglobulin variable region is an immunoglobulinvariable region that includes sufficient number of human framework aminoacid positions such that the immunoglobulin variable region does notelicit an immunogenic response in a normal human. Descriptions of“humanized” immunoglobulins include, for example, U.S. Pat. No.6,407,213 and U.S. Pat. No. 5,693,762.

An “effectively human” immunoglobulin variable region is animmunoglobulin variable region that includes a sufficient number ofhuman framework amino acid positions such that the immunoglobulinvariable region does not elicit an immunogenic response in a normalhuman. An “effectively human” antibody is an antibody that includes asufficient number of human amino acid positions such that the antibodydoes not elicit an immunogenic response in a normal human.

As used herein, “Tie complex” refers to a heteromeric complex thatincludes Tie1, Tie2, and an angiopoietin (Ang). The Tie complex isformed in part by association of the extracellular domains of Tie1 andTie2 and also includes Ang. As used herein, “complex members” refers tothe proteins that are included in a heteromeric Tie complex.Accordingly, Tie1, Tie2, and Ang are all complex members. The term “Ang”includes all angiopoietins, such as Ang1, Ang2, Ang3, and Ang4. Theheteromeric Tie complex can include other proteins in addition to Tie1,Tie2, and Ang. A protein or ligand that antagonizes complex formationinhibits or decreases the association of Tie1, Tie2, or Ang with atleast one other member of the complex and thereby decreases Tie2signaling and downstream effects such as angiogenesis. Angiogenesisincludes all stages of vessel development (e.g., blood or lymphaticvessel development), including initial vessel formation and later vesselremodeling and morphological changes.

As used herein, the terms “agonist” and “antagonist” describe propertiesin context of a particular activity or effect. For example, the E3 orE3b antibody can be an agonist in the context of promoting Tie1self-association (e.g., homodimerization), yet an antagonist in thecontext of decreasing or inhibiting Tie complex formation and tubeformation by HUVECs. Likewise, an agent that is an agonist in thecontext of a Tie1 signaling pathway can be an antagonist in the contextof endothelial cell sprouting, splitting, and tube formation.

The term “Tie1 ectodomain” refers to an extracellular region of a Tie1protein, e.g., a region that includes about amino acids 25-759 of SEQ IDNO:2. Other exemplary regions are regions that include one or moreEGF-like domains (e.g., 214-256, 258-303, 303-345, 214-303, 258-345, or214-345 of SEQ ID NO:2); one or more Ig-Like C2-type domains (e.g.,43-105, 43-426, 372-426); one or more Fibronectin Type III repeats(e.g., 446-540, 543-639, 643-744, 446-639, 543-744, or 446-744 of SEQ IDNO:2); and combinations thereof. The terms “first Ig-like C2-typedomain” and “Ig 1” refer to the immunoglobulin-like domain in Tie1 orTie2 that is located closest to the amino terminus of the proteinrelative to the other Ig-like C2-type domain (the second such domain).For example, for Tie1, the first Immunoglobulin-like C2-type domain islocated at about residue 43 to about residue 105 and the second Ig-likeC2-type domain is located at about residue 372 to about residue 426.

As used herein, “binding affinity” refers to the apparent associationconstant or K_(a). The K_(a) is the reciprocal of the dissociationconstant (K_(d)). A ligand may, for example, have a binding affinity ofat least 10⁵, 10⁶, 10⁷ or 10⁸ M⁻¹ for a particular target molecule.Higher affinity binding of a ligand to a first target relative to asecond target can be indicated by a higher K_(a) (or a smaller numericalvalue K_(d)) for binding the first target than the K_(a) (or numericalvalue K_(d)) for binding the second target. In such cases the ligand hasspecificity for the first target relative to the second target.Differences in binding affinity (e.g., for specificity or othercomparisons) can be at least 1.5, 2, 5, 10, 50, 100, or 1000-fold. Forexample, a Tie1 -binding protein may preferentially bind to Tie1 atleast 1.5, 2, 5, 10, 50, 100, or 1000-fold better than to anotherantigen, e.g., Tie2, EGF, fibronectin, or human serum albumin. ATie1-binding protein may also be species-specific or species-general(e.g., can bind to a Tie1 protein from more than one species).

Binding affinity can be determined by a variety of methods includingequilibrium dialysis, equilibrium binding, gel filtration, ELISA,surface plasmon resonance, or spectroscopy (e.g., using a fluorescenceassay). These techniques can be used to measure the concentration ofbound and free ligand as a function of ligand (or target) concentration.The concentration of bound ligand ([Bound]) is related to theconcentration of free ligand ([Free]) and the concentration of bindingsites for the ligand on the target where (N) is the number of bindingsites per target molecule by the following equation:

[Bound]=N·[Free]/((1/Ka)+[Free])

Although quantitative measurements of Ka are routine, it is not alwaysnecessary to make an exact determination of K_(a), though, sincesometimes it is sufficient to obtain a qualitative measurement ofaffinity, e.g., determined using a method such as ELISA or FACSanalysis, is proportional to K_(a), and thus can be used forcomparisons, such as determining whether a higher affinity is, e.g., 2,5, 10, 20, or 50 fold higher than a reference. Binding affinity istypically evaluated in 0.01 M HEPES pH 7.4, 0.15 M NaCl, 3 mM EDTA and0.005% (v/v) surfactant P20.

An “isolated composition” refers to a composition that is removed fromat least 90% of at least one component of a natural sample from whichthe isolated composition can be obtained. Compositions producedartificially or naturally can be “compositions of at least” a certaindegree of purity if the species or population of species of interests isat least 5, 10, 25, 50, 75, 80, 90, 95, 98, or 99% pure on aweight-weight basis.

An “epitope” refers to the site on a target compound that is bound by aligand, e.g., an antigen-binding protein (e.g., a Fab or antibody). Inthe case where the target compound is a protein, for example, an epitopemay refer to the amino acids that are bound by the ligand. Overlappingepitopes include at least one common amino acid residue.

As used herein, the term “substantially identical” (or “substantiallyhomologous”) is used herein to refer to a first amino acid or nucleotidesequence that contains a sufficient number of identical or equivalent(e.g., with a similar side chain, e.g., conserved amino acidsubstitutions) amino acid residues or nucleotides to a second amino acidor nucleotide sequence such that the first and second amino acid ornucleotide sequences have similar activities. In the case of antibodies,the second antibody has the same specificity and has at least 50% of theaffinity of the same.

Sequences similar or homologous (e.g., at least about 85% sequenceidentity) to the sequences disclosed herein are also part of thisapplication. In some embodiment, the sequence identity can be about 85%,90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or higher.Alternatively, substantial identity exists when the nucleic acidsegments will hybridize under selective hybridization conditions (e.g.,highly stringent hybridization conditions), to the complement of thestrand. The nucleic acids may be present in whole cells, in a celllysate, or in a partially purified or substantially pure form.

Calculations of “homology” or “sequence identity” between two sequences(the terms are used interchangeably herein) are performed as follows.The sequences are aligned for optimal comparison purposes (e.g., gapscan be introduced in one or both of a first and a second amino acid ornucleic acid sequence for optimal alignment and non-homologous sequencescan be disregarded for comparison purposes). In a preferred embodiment,the length of a reference sequence aligned for comparison purposes is atleast 30%, preferably at least 40%, more preferably at least 50%, evenmore preferably at least 60%, and even more preferably at least 70%,80%, 90%, 100% of the length of the reference sequence. The amino acidresidues or nucleotides at corresponding amino acid positions ornucleotide positions are then compared. When a position in the firstsequence is occupied by the same amino acid residue or nucleotide as thecorresponding position in the second sequence, then the molecules areidentical at that position (as used herein amino acid or nucleic acid“identity” is equivalent to amino acid or nucleic acid “homology”). Thepercent identity between the two sequences is a function of the numberof identical positions shared by the sequences, taking into account thenumber of gaps, and the length of each gap, which need to be introducedfor optimal alignment of the two sequences.

The comparison of sequences and determination of percent identitybetween two sequences can be accomplished using a mathematicalalgorithm. In a preferred embodiment, the percent identity between twoamino acid sequences is determined using the Needleman and Wunsch((1970) J. Mol. Biol. 48:444-453) algorithm which has been incorporatedinto the GAP program in the GCG software package, using either a Blossum62 matrix or a PAM250 matrix, and a gap weight of 16, 14, 12, 10, 8, 6,or 4 and a length weight of 1, 2, 3, 4, 5, or 6. In yet anotherpreferred embodiment, the percent identity between two nucleotidesequences is determined using the GAP program in the GCG softwarepackage, using a NWSgapdna.CMP matrix and a gap weight of 40, 50, 60,70, or 80 and a length weight of 1, 2, 3, 4, 5, or 6. A particularlypreferred set of parameters (and the one that should be used if thepractitioner is uncertain about what parameters should be applied todetermine if a molecule is within a sequence identity or homologylimitation described herein) are a Blossum 62 scoring matrix with a gappenalty of 12, a gap extend penalty of 4, and a frameshift gap penaltyof 5.

As used herein, the term “homologous” is synonymous with “similarity”and means that a sequence of interest differs from a reference sequenceby the presence of one or more amino acid substitutions (although modestamino acid insertions or deletions) may also be present. Presentlypreferred means of calculating degrees of homology or similarity to areference sequence are through the use of BLAST algorithms (availablefrom the National Center of Biotechnology Information (NCBI), NationalInstitutes of Health, Bethesda Md.), in each case, using the algorithmdefault or recommended parameters for determining significance ofcalculated sequence relatedness. The percent identity between two aminoacid or nucleotide sequences can also be determined using the algorithmof E. Meyers and W. Miller ((1989) CABIOS, 4:11-17) which has beenincorporated into the ALIGN program (version 2.0), using a PAM120 weightresidue table, a gap length penalty of 12 and a gap penalty of 4.

As used herein, the term “hybridizes under low stringency, mediumstringency, high stringency, or very high stringency conditions”describes conditions for hybridization and washing. Guidance forperforming hybridization reactions can be found in Current Protocols inMolecular Biology, John Wiley & Sons, N.Y. (1989), 6.3.1-6.3.6. Aqueousand nonaqueous methods are described in that reference and either can beused. Specific hybridization conditions referred to herein are asfollows: 1) low stringency hybridization conditions in 6× sodiumchloride/sodium citrate (SSC) at about 45° C., followed by two washes in0.2×SSC, 0.1% SDS at least at 50° C. (the temperature of the washes canbe increased to 55° C. for low stringency conditions); 2) mediumstringency hybridization conditions in 6×SSC at about 45° C., followedby one or more washes in 0.2×SSC, 0.1% SDS at 60° C.; 3) high stringencyhybridization conditions in 6×SSC at about 45° C., followed by one ormore washes in 0.2×SSC, 0.1% SDS at 65° C.; and 4) very high stringencyhybridization conditions are 0.5M sodium phosphate, 7% SDS at 65° C.,followed by one or more washes at 0.2×SSC, 1% SDS at 65° C.

It is understood that the proteins described herein may have mutationsrelative to a particular protein described herein (e.g., a conservativeor non-essential amino acid substitutions), which do not have asubstantial effect on function. Whether or not a particular substitutionwill be tolerated, i.e., will not adversely affect desired biologicalproperties, such as binding activity can be determined as described inBowie, et al. (1990) Science 247:1306-1310. A “conservative amino acidsubstitution” is one in which the amino acid residue is replaced with anamino acid residue having a similar side chain. Families of amino acidresidues having similar side chains have been defined in the art. Thesefamilies include amino acids with basic side chains (e.g., lysine,arginine, histidine), acidic side chains (e.g., aspartic acid, glutamicacid), uncharged polar side chains (e.g., glycine, asparagine,glutamine, serine, threonine, tyrosine, cysteine), nonpolar side chains(e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine,methionine, tryptophan), beta-branched side chains (e.g., threonine,valine, isoleucine) and aromatic side chains (e.g., tyrosine,phenylalanine, tryptophan, histidine). It is possible, for example, forframework and CDR amino acid residues to include one or moreconservative substitutions.

A “non-essential” amino acid residue is a residue that can be alteredfrom the wild-type sequence of the binding agent, e.g., the antibody,without abolishing or more preferably, without substantially altering abiological activity, whereas an “essential” amino acid residue resultsin such a change.

Generally, where “X” is used to represent an amino acid residue, anyamino acid (e.g., any of the twenty naturally occurring amino acids) canbe used at that position, or at least a subset thereof (e.g., any of thenineteen non-cysteine amino acids).

The terms “polypeptide” or “peptide” (which may be used interchangeably)refer to a polymer of three or more amino acids linked by a peptidebond, e.g., between 3 and 30, 12 and 60, or 30 and 300, or over 300amino acids in length. The polypeptide may include one or more unnaturalamino acids. Typically, the polypeptide includes only natural aminoacids. A “protein” can include one or more polypeptide chains.Accordingly, the term “protein” encompasses polypeptides. A protein orpolypeptide can also include one or more modifications, e.g., aglycosylation, amidation, phosphorylation, and so forth. The term “smallpeptide” can be used to describe a polypeptide that is between 3 and 30amino acids in length, e.g., between 8 and 24 amino acids in length.

Statistical significance can be determined by any art known method.Exemplary statistical tests include: the Students T-test, Mann Whitney Unon-parametric test, and Wilcoxon non-parametric statistical test. Somestatistically significant relationships have a P value of less than0.05, or 0.02. Particular ligands may show a difference, e.g., inspecificity or binding, that are statistically significant (e.g., Pvalue <0.05 or 0.02).

Other features and advantages of the instant invention will become moreapparent from the following detailed description and claims. Embodimentsof the invention can include any combination of features describedherein. In no case does the term “embodiment” necessarily exclude one ormore other features disclosed herein, e.g., in another embodiment. Thecontents of all references, patent applications and patents, citedthroughout this application are hereby expressly incorporated byreference.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 illustrates a bivariant FACS plot showing labelling with theplatelet specific marker CD42 with Tie1 and labelling with the E3antibody. Only a background number of CD42 positive cells are labeled bythe E3 antibody.

FIGS. 2A, 2B, 2C, and 2D are plots of the number of branching pointsversus antibody concentration comparing germlined E3 (2C and 2D) withparental E3 (2A and 2B).

FIG. 3 depicts a graph of blood vessel density in matrigels that werestained with fluorescein-lectin from an in vivo assay using MATRIGEL™and evaluating the germlined E3 antibody.

FIG. 4 depicts results of tube formation in HUVECs using the parental E3and E3b (germlined) proteins.

FIG. 5 depicts graphically the results from animal studies in whichnu/nu mice were implanted with SW-480 colorectal cancer cells andtreated with DX-2220 (10 mg/kg), cisplatin (4 mg/kg), or a control.Control conditions were: no treatment, PBS vehicle alone, or anon-specific, isotype-matched IgG1 antibody (A2-SV) (10 mg/kg). Tumorweight is plotted on the y axis; days after tumor cell injection isplotted on the x axis.

FIG. 6 depicts graphically the results from animal studies in whichnu/nu mice were implanted with LNM35 lung cancer cells and treated withDX-2220 (20 mg/kg) or a non-specific, isotype-matched IgG1 antibody(A2-SV) (20 mg/kg). Tumor volume (mm³) is plotted on the y axis; daysafter tumor cell injection is plotted on the x axis.

FIGS. 7A and 7B list the amino acid sequence of the heavy chain variabledomain and the light chain variable domain of clone p-A1, respectively.

FIGS. 8A and 8B list the amino acid sequence of the heavy chain variabledomain and the light chain variable domain of clone p-A5, respectively.

FIGS. 9A and 9B list the amino acid sequence of the heavy chain variabledomain and the light chain variable domain of clone p-A6, respectively.

FIGS. 10A and 10B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-Al 0,respectively.

FIGS. 11A and 11B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-B1,respectively.

FIGS. 12A and 12B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-B3,respectively.

FIGS. 13A and 13B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-C6,respectively.

FIGS. 14A and 14B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-D6,respectively.

FIGS. 15A and 15B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-D10,respectively.

FIGS. 16A and 16B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-D12,respectively.

FIGS. 17A and 17B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-F3,respectively.

FIGS. 18A and 18B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-F4,respectively.

FIGS. 19A and 19B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone p-G3,respectively.

FIGS. 20A and 20B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-A2,respectively.

FIGS. 21A and 21B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-Al 0,respectively.

FIGS. 22A and 22B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-B2,respectively.

FIGS. 23A and 23B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-B9,respectively.

FIGS. 24A and 24B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-C2,respectively.

FIGS. 25A and 25B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-C7,respectively.

FIGS. 26A and 26B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-C10,respectively.

FIGS. 27A and 27B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-D11,respectively.

FIGS. 28A and 28B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-E11,respectively.

FIGS. 29A and 29B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-G4,respectively.

FIG. 30 lists the amino acid sequence of the light chain variable domainof clone s-G9.

FIGS. 31A and 31B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-G10,respectively.

FIGS. 32A and 32B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-H1,respectively.

FIGS. 33A and 33B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone s-H4,respectively.

FIGS. 34A and 34B list the amino acid sequence of the heavy chainvariable domain and the light chain variable domain of clone G2,respectively.

FIGS. 35 and 36 list the amino acid sequence of the heavy chain variabledomain and the light chain variable domain of clone p-A1, respectively.

FIG. 37 provides Table 5, a summary of heavy chain sequences.

FIG. 38 provides Table 6, a summary of light chain sequences.

FIG. 39 provides Table 9, characteristics of some exemplary Tie1 bindingantibodies.

DETAILED DESCRIPTION

This disclosure provides, inter alia, agents (also referred to asbinding proteins and ligands) that bind to components of a Tie complex,e.g., Tie1, Tie2, and Ang. Examples of such agents include proteins, forexample, a small peptide (e.g., a cyclic or linear peptide, e.g., ofbetween 7 and 25 amino acids), a polypeptide (e.g., a polypeptide of atleast 20 amino acids), or a multi-chain protein (e.g., including atleast two peptides or polypeptides). An example of a multi-chain proteinis an IgG full-length antibody that has separate heavy and light chains.An example of a polypeptide is a single chain antibody.

Agents can be selected that have particular properties, e.g., ability toantagonize Tie1/Tie2/Ang complex formation, ability to promote Tie1homodimerization, and ability to promote Tie1 phosphorylation. Forexample, agents that bind to Tie1, Tie2, or Ang can be tested for theirability to antagonize formation of heteromeric Tie complexes. Antagonismof this complex decreases Tie2 signaling and its downstream effects,such as promoting angiogenesis.

Tie1 is a receptor tyrosine kinase protein that includes a transmembranedomain. Tie1 is present almost exclusively on endothelial cells.Accordingly, a Tie1-binding protein can be used, e.g., to specificallyrecognize or target an endothelial cell. Some Tie1-binding proteins canalso be used to agonize or antagonize endothelial cells. In someembodiments, these Tie1-binding proteins have an affinity for particularstructural features (e.g., a feature listed below), a combination offeatures listed below, and/or an epitope that includes at least oneamino acid in a structural feature listed below (The sequence isrelative to the amino acid sequence provided in SEQ ID NO:2, Example 1,below):

Key From To Length Description SIGNAL 1 24 24 POTENTIAL. CHAIN 25 11381114 TYROSINE-PROTEIN KINASE RECEPTOR TIE1. DOMAIN 25 759 735EXTRACELLULAR (POTENTIAL). TRANSMEM 760 784 25 POTENTIAL. DOMAIN 7851138 354 CYTOPLASMIC (POTENTIAL). DOMAIN 43 105 63 IG-LIKE C2-TYPE 1.DOMAIN 214 256 43 EGF-LIKE 1. DOMAIN 258 303 46 EGF-LIKE 2. DOMAIN 305345 41 EGF-LIKE 3. DOMAIN 372 426 55 IG-LIKE C2-TYPE 2. DOMAIN 446 54095 FIBRONECTIN TYPE-III 1. DOMAIN 543 639 97 FIBRONECTIN TYPE-III 2.DOMAIN 643 744 102 FIBRONECTIN TYPE-III 3. DOMAIN 839 1118 280 PROTEINKINASE. NP_BIND 845 853 9 ATP (BY SIMILARITY). BINDING 870 870 ATP (BYSIMILARITY). ACT_SITE 979 979 BY SIMILARITY. CARBOHYD 83 83 N-LINKED(GLCNAC . . . ) (POTENTIAL). CARBOHYD 161 161 N-LINKED (GLCNAC . . . )(POTENTIAL). CARBOHYD 503 503 N-LINKED (GLCNAC . . . ) (POTENTIAL).CARBOHYD 596 596 N-LINKED (GLCNAC . . . ) (POTENTIAL). CARBOHYD 709 709N-LINKED (GLCNAC . . . ) (POTENTIAL). MOD_RES 1007 1007 PHOSPHORYLATION(AUTO-) (BY SIMILARITY).

Tie2 is a receptor tyrosine kinase protein that includes a transmembranedomain. Tie2 is present almost exclusively on endothelial cells.Accordingly, a Tie2-binding protein can be used, e.g., to specificallyrecognize or target an endothelial cell. Some Tie2-binding proteins canalso be used to modulate (e.g., agonize or antagonize) an activity of anendothelial cell. In some embodiments, these Tie2-binding proteins havean affinity for particular structural features, a combination offeatures, and/or an epitope that includes at least one amino acid in astructural feature. Exemplary structural features of Tie2 include: twoIg-like domains, three EGF-like domains, and three fibronectin type IIIdomains.

The angiopoietins are a family of ligands that bind to Tie2. SomeAng-binding proteins (e.g., antibodies or artificial Ang-bindingproteins) can be used to agonize or antagonize endothelial cells. Insome embodiments, these Ang-binding proteins have an affinity forparticular structural features, a combination of features, and/or anepitope that includes at least one amino acid in a structural feature.Exemplary structural features include: the N-terminal region of about 50amino acids, the coiled-coil domain, or the fibrinogen-like domain.

Examples of Ang-binding proteins include proteins that inhibit Angmultimerization (e.g., ability of Ang proteins to form tetramers),proteins that inhibit Ang-Tie2 interactions, and proteins that inhibit aternary complex of Tie1-Tie2-Ang. Inhibitory proteins can function bydisrupting existing interactions or by preventing interactions fromoccurring.

Tie1 and Tie2 can associate through their extracellular domains and forma heteromeric complex with an angiopoietin (Ang), such as Ang1, Ang2,Ang3, and Ang4. This heteromeric complex activates the intracellularsignaling cascade mediated by Tie2. Thus, antagonizing formation of thisheteromeric complex provides a novel approach to inhibiting Tie2signaling and its downstream effects, such as angiogenesis. Complexformation can be antagonized by proteins that bind to the extracellulardomains of Tie1 or Tie2 or that bind to Ang so as to prevent itsrecruitment into the complex or to prevent its multimerization.

One method for identifying proteins that bind to Tie1 includes:providing a library and selecting from the library one or more membersthat encode a protein that binds to the Tie1 antigen or a fragmentthereof (e.g., the extracellular domain, an EGF domain, a fibronectinrepeat, or an Ig-superfamily domain (e.g., a Ig-like C2-type 2 domain)).The selection can be performed in a number of ways. For example, thelibrary can be a display library. The Tie1 can be tagged andrecombinantly expressed. The Tie1 is purified and attached to a support,e.g., to affinity beads, or paramagnetic beads or other magneticallyresponsive particles. The Tie1 can also be expressed on the surface of acell. Members of the display library that specifically bind to the cell,e.g., only if the Tie1 is activated, can be selected. Analogousprocedures can be performed to identify proteins that bind to Tie2 or afragment thereof (e.g., the extracellular domain, an EGF domain, afibronectin repeat, or an Ig-superfamily domain (e.g., a Ig-like C2-type2 domain)). Analogous procedures can also be performed to identifyproteins that bind to Ang or a fragment thereof (e.g., the N-terminaldomain, the coiled-coil domain, or the fibrinogen-like domain).

Proteins identified as being capable of binding a Tie complex member canbe tested for their ability to antagonize heteromeric complex formation,ability to promote Tie1 phosphorylatoin, and/or ability to promote Tie1homodimerization, as described in the examples below. Proteinsidentified as antagonizing formation of the heteromeric complex can beused in pharmaceutical compositions to treat a subject in need of suchtreatment, for example, a subject with an angiogenesis-dependent canceror tumor or other angiogenesis-related disorders.

Exemplary Tie1 Modulators

In one embodiment, a Tie1-binding protein can modulate a Tie1 activity.For example, a Tie1 -binding protein can function as a Tie1 agonist orantagonist in the Tie1/EpoR chimeric BaF3 cell assay described inExample 2. Tie1 agonists in this Tie1/EpoR chimeric BaF3 cell assay canstimulate certain activity of an endothelial cell under particularconditions, e.g., the conditions of the Tie1/EpoR chimeric BaF3 cellassay.

Some Tie1 binding proteins increase phosphatidyl inositol 3-kinase (PI3kinase) activity in an endothelial cell and/or Akt kinase activity.Kontos et al. suggest that the cytoplasmic domain of Tie1 can associatewith the p85 subunit of PI3 kinase and activate PI3 kinase activity.Kontos et al. (2002) Mol. Cell Biol. 22:1704-1713. The Tie1 cytoplasmicdomain may also associate with a protein tyrosine phosphatase Shpt. See,e.g., Marron et al. (2000) Adv. Exp. Med. Biol. 476:35-46.

Some Tie binding proteins may increase dimerization, and/or tyrosinephosphorylation (e.g., as a result of auto-phosphorylation) of the Tie1cytoplasmic domain, e.g., the tyrosine in the motif YVN at about aminoacid 1117.

Tie1-binding protein can be evaluated in a cell assay (e.g., in theTie1/EpoR chimeric BaF3 cell assay as described below in Example 2). Anexemplary cell assay uses a growth factor dependent cell in which achimeric receptor that includes the Tie1 ectodomain fused to theintracellular domain of the growth factor receptor is expressed. Cellsare evaluated for ability to grow in the absence of the essential growthfactor, but in the presence of a test compound, e.g., a Tie1-bindingprotein. If the Tie1-binding protein agonizes Tie1 in the Tie1/EpoRchimeric BaF3 cell assay, a signalling activity of the Tie1 chimera cansubstitute for stimulation by the required growth factor thorough itscognate receptor. Thus, survival of the cell in the absence of therequired growth factor can be used as an indication that theTie1-binding protein interacts with the Tie1 ectodomain.

Tie1 agonists in the Tie1/EpoR chimeric BaF3 cell assay may behave asinhibitors of Tie1 activity under other conditions, e.g., in vivo, and,irrespective of in vitro properties, may be useful as inhibitors ofangiogenesis in vivo.

Tie1 binding proteins can be used, e.g., to reduce an activity of anendothelial cell. For example, some Tie1 binding proteins can be used todecrease phosphatidyl inositol 3-kinase (PI3 kinase) activity in anendothelial cell, Shp2 activity, and/or Akt kinase activity. Some Tie1binding proteins may also reduce dimerization, and/or tyrosinephosphorylation (e.g., as a result of auto-phosphorylation) of the Tie1cytoplasmic domain, e.g., the tyrosine in the motif YVN at about aminoacid 1117.

Tie1 -binding protein can be evaluated for activity in a cell assay. Forexample, the binding protein can be assayed for ability to preventanother ligand, e.g., the E3 antibody, from modulating a Tie1 activityin a cell assay described herein (e.g., the Tie1/EpoR chimeric BaF3 cellassay as described below in Example 2).

Display Libraries

A number of methods can be used to identify proteins that bind to Tie1,Tie2, Ang, fragments thereof, complexes that include one or more ofthese proteins or fragments thereof. In one embodiment, a displaylibrary is used to identify such proteins. A display library is acollection of entities; each entity includes an accessible proteincomponent and a recoverable component that encodes or identifies theprotein component. The protein component can be of any length, e.g. fromthree amino acids to over 300 amino acids. In a selection, the proteincomponent of each member of the library is probed with a target, e.g.,Tie1 protein, and if the protein component binds to the target, thedisplay library member is identified, e.g., by retention on a support.The method can be adapted for other targets, such as Tie2, Ang,fragments thereof, complexes that include one or more of these proteinsor fragments thereof.

Retained display library members are recovered from the support andanalyzed. The analysis can include amplification and a subsequentselection under similar or dissimilar conditions. For example, positiveand negative selections can be alternated. The analysis can also includedetermining the amino acid sequence of the protein component andpurification of the protein component for detailed characterization. Avariety of formats can be used for display libraries. Examples includethe following.

Phage Display. One format utilizes viruses, particularly bacteriophages.This format is termed “phage display.” The protein component istypically covalently linked to a bacteriophage coat protein. The linkageresults form translation of a nucleic acid encoding the proteincomponent fused to the coat protein. The linkage can include a flexiblepeptide linker, a protease site, or an amino acid incorporated as aresult of suppression of a stop codon. Phage display is described, forexample, in Ladner et al., U.S. Pat. No. 5,223,409; Smith (1985) Science228:1315-1317; WO 92/18619; WO 91/17271; WO 92/20791; WO 92/15679; WO93/01288; WO 92/01047; WO 92/09690; WO 90/02809; de Haard et al. (1999)J. Biol. Chem 274:18218-30; Hoogenboom et al. (1998) Immunotechnology4:1-20; Hoogenboom et al. (2000) Immunol Today 2:371-8; Fuchs et al.(1991) Bio/Technology 9:1370-1372; Hay et al. (1992) Hum AntibodHybridomas 3:81-85; Huse et al. (1989) Science 246:1275-1281; Griffithset al. (1993) EMBO J 12:725-734; Hawkins et al. (1992) J Mol Biol226:889-896; Clackson et al. (1991) Nature 352:624-628; Gram et al.(1992) PNAS 89:3576-3580; Garrard et al. (1991) Bio/Technology9:1373-1377; Rebar et al. (1996) Methods Enzymol. 267:129-49; Hoogenboomet al. (1991) Nuc Acid Res 19:4133-4137; and Barbas et al. (1991) PNAS88:7978-7982.

Phage display systems have been developed for filamentous phage (phagefl, fd, and M13) as well as other bacteriophage (e.g. T7 bacteriophageand lambdoid phages; see, e.g., Santini (1998) J. Mol. Biol.282:125-135; Rosenberg et al. (1996) Innovations 6:1-6; Houshmet al.(1999) Anal Biochem 268:363-370). The filamentous phage display systemstypically use fusions to a minor coat protein, such as gene III protein,and gene VIII protein, a major coat protein, but fusions to other coatproteins such as gene VI protein, gene VII protein, gene IX protein, ordomains thereof can also been used (see, e.g., WO 00/71694). In oneembodiment, the fusion is to a domain of the gene III protein, e.g., theanchor domain or “stump,” (see, e.g., U.S. Pat. No. 5,658,727 for adescription of the gene III protein anchor domain). It is also possibleto physically associate the protein being displayed to the coat using anon-peptide linkage, e.g., a non-covalent bond or a non-peptide covalentbond. For example, a disulfide bond and/or c-fos and c-jun coiled-coilscan be used for physical associations (see, e.g., Crameri et al. (1993)Gene 137:69 and WO 01/05950).

Bacteriophage displaying the protein component can be grown andharvested using standard phage preparatory methods, e.g., PEGprecipitation from growth media. After selection of individual displayphages, the nucleic acid encoding the selected protein components, byinfecting cells using the selected phages. Individual colonies orplaques can be picked, the nucleic acid isolated and sequenced.

Cell-based Display. In still another format the library is acell-display library. Proteins are displayed on the surface of a cell,e.g., a eukaryotic or prokaryotic cell. Exemplary prokaryotic cellsinclude E. coli cells, B. subtilis cells, and spores (see, e.g., Lu etal. (1995) Biotechnology 13:366). Exemplary eukaryotic cells includeyeast (e.g., Saccharomyces cerevisiae, Schizosaccharomyces pombe,Hanseula, or Pichia pastoris). Yeast surface display is described, e.g.,in Boder and Wittrup (1997) Nat. Biotechnol. 15:553-557 and WO03/029456, which describes a yeast display system that can be used todisplay immunoglobulin proteins such as Fab fragments and the use ofmating to generate combinations of heavy and light chains.

Ribosome Display. RNA and the polypeptide encoded by the RNA can bephysically associated by stabilizing ribosomes that are translating theRNA and have the nascent polypeptide still attached. Typically, highdivalent Mg²⁺ concentrations and low temperature are used. See, e.g.,Mattheakis et al. (1994) Proc. Natl. Acad. Sci. USA 91:9022 and Hanes etal. (2000) Nat Biotechnol. 18:1287-92; Hanes et al. (2000) MethodsEnzymol. 328:404-30; and Schaffitzel et al. (1999) J Immunol Methods.231(1-2):119-35.

Polypeptide-Nucleic Acid Fusions. Another format utilizespolypeptide-nucleic acid fusions. Polypeptide-nucleic acid fusions canbe generated by the in vitro translation of mRNA that include acovalently attached puromycin group, e.g., as described in Roberts andSzostak (1997) Proc. Natl. Acad. Sci. USA 94:12297-12302, and U.S. Pat.No. 6,207,446. The mRNA can then be reverse transcribed into DNA andcrosslinked to the polypeptide.

Other Display Formats. Yet another display format is a non-biologicaldisplay in which the protein component is attached to a non-nucleic acidtag that identifies the polypeptide. For example, the tag can be achemical tag attached to a bead that displays the polypeptide or aradiofrequency tag (see, e.g., U.S. Pat. No. 5,874,214).

Display technology can also be used to obtain binding proteins, e.g.,antibodies that interact with particular epitopes of a target. This canbe done, for example, by using competing non-target molecules that lackthe particular epitope or are mutated within the epitope, e.g., withalanine. Such non-target molecules can be used in a negative selectionprocedure as described below, as competing molecules when binding adisplay library to the target, or as a pre-elution agent, e.g., tocapture in a wash solution dissociating display library members that arenot specific to the target.

Iterative Selection. In one preferred embodiment, display librarytechnology is used in an iterative mode. A first display library is usedto identify one or more binding proteins for a target. These proteinsare then varied, e.g., using a mutagenesis method, to form a seconddisplay library. Higher affinity binding proteins are then selected fromthe second library, e.g., by using higher stringency or more competitivebinding and washing conditions.

In some implementations, the mutagenesis is targeted to regions known orlikely to be at the binding interface. If, for example, the identifiedbinding proteins are antibodies, then mutagenesis can be directed to theCDR regions of the heavy or light chains as described herein. Further,mutagenesis can be directed to framework regions near or adjacent to theCDRs, e.g., framework regions, particular within ten, five, or threeamino acids of a CDR junction. In the case of antibodies, mutagenesiscan also be limited to one or a few of the CDRs, e.g., to make precisestep-wise improvements.

Some exemplary mutagenesis techniques include: error-prone PCR (Leung etal. (1989) Technique 1:11-15), recombination (see, e.g., U.S. Ser. No.10/279,633), DNA shuffling using random cleavage (Stemmer (1994) Nature389-391; termed “nucleic acid shuffling”), RACHITT™ (Coco et al. (2001)Nature Biotech. 19:354), site-directed mutagenesis (Zoller et al. (1987)Nucl Acids Res 10:6487-6504), cassette mutagenesis (Reidhaar-Olson(1991) Methods Enzymol. 208:564-586) and incorporation of degenerateoligonucleotides (Griffiths et al. (1994) EMBO J 13:3245).

In one example of iterative selection, the methods described herein areused to first identify a binding protein from a display library thatbinds a Tie1 with at least a minimal binding specificity for a target ora minimal activity, e.g., an equilibrium dissociation constant forbinding of greater than 1 nM, 10 nM, or 100 nM. The nucleic acidsequence encoding the initial identified binding protein is used as atemplate nucleic acid for the introduction of variations, e.g., toidentify a second binding protein that has enhanced properties (e.g.,binding affinity, kinetics, or stability) relative to the initialbinding protein.

Off-Rate Selection. Since a slow dissociation rate can be predictive ofhigh affinity, particularly with respect to interactions betweenpolypeptides and their targets, the methods described herein can be usedto isolate binding proteins with a desired kinetic dissociation rate(i.e. reduced) for a binding interaction to a target.

To select for slow dissociating binding proteins from a display library,the library is contacted to an immobilized target. The immobilizedtarget is then washed with a first solution that removesnon-specifically or weakly bound biomolecules. Then the immobilizedtarget is eluted with a second solution that includes a saturationamount of free target, i.e., replicates of the target that are notattached to the particle. The free target binds to biomolecules thatdissociate from the target. Rebinding is effectively prevented by thesaturating amount of free target relative to the much lowerconcentration of immobilized target.

The second solution can have solution conditions that are substantiallyphysiological or that are stringent. Typically, the solution conditionsof the second solution are identical to the solution conditions of thefirst solution. Fractions of the second solution are collected intemporal order to distinguish early from late fractions. Later fractionsinclude biomolecules that dissociate at a slower rate from the targetthan biomolecules in the early fractions. It is also possible to recoverdisplay library members that remain bound to the target even afterextended incubation. These can either be dissociated using chaotropicconditions or can be amplified while attached to the target. Forexample, phage bound to the target can be contacted to bacterial cells.

Selecting and Screening for Specificity. “Selection” refers to a processin which many members of a display library are allowed to contact thetarget and those that bind are recovered and propagated. The selectioncan be from a library having numerous members, e.g., more than 10¹⁰members. “Screening” refers to a process in which isolated members ofthe library are tested singly for binding to the target. Throughautomation, thousands of candidates may be screened in a highly parallelprocess. The display library selection methods described herein caninclude a selection process that discards display library members thatbind to a non-target molecule. Examples of non-target molecules include,e.g., extracellular domains of molecules that include an immunoglobulinsuper-family domain or an EGF domain and receptor tyrosine kinases otherthan Tie1, e.g., Tie2, or other than Tie2, e.g., Tie1, or other thanTie1 and Tie2. In one implementation, a so-called “negative selection”step is used to discriminate between the target and related non-targetmolecule and a related, but distinct non-target molecules. The displaylibrary or a pool thereof is contacted to the non-target molecule.Members of the sample that do not bind the non-target are collected andused in subsequent selections for binding to the target molecule or evenfor subsequent negative selections. The negative selection step can beprior to or after selecting library members that bind to the targetmolecule.

In another implementation, a screening step is used. After displaylibrary members are isolated for binding to the target molecule, eachisolated library member is tested for its ability to bind to anon-target molecule (e.g., a non-target listed above). For example, ahigh-throughput ELISA screen can be used to obtain this data. The ELISAscreen can also be used to obtain quantitative data for binding of eachlibrary member to the target. The non-target and target binding data arecompared (e.g., using a computer and software) to identify librarymembers that specifically bind to Tie1, Tie2, Ang, fragments thereof, ora complex comprising one or more such components.

The display library selection and screening methods described herein caninclude a selection or screening process that selects for displaylibrary members that bind to specific sites on the target molecule. Forexample, elution with high concentration of an antibody described hereincan be used to select for phage that bind to an epitope that is near oroverlaps with the epitope bound by the antibody used for elution.Accordingly, one can screen for a phage that binds to the E3-bindingsite of Tie1 by performing ELISAs with and without E3 antibody in thebuffer.

The following description provides one exemplary method for identifyingantibodies that bind to Tie1 using a phagemid Fab library. For example,three rounds of selection can be performed with decreasing amounts oftarget protein (e.g., 100, 50 and 50 μg for first, second, and thirdrounds, respectively). The target is immobilized on streptavidin coatedmagnetic beads (Dynal). The library is depleted against streptavidincoated magnetic beads prior to each round of selection and optionallyagainst an unrelated protein which may include a common purificationhandle. For example, if the target is produced as a fusion to a Fcdomain, the library can be depleted against soluble Trail-Fc (acommercially available Fc fusion protein). The depletion process removesFc binders.

Each round of selection can include, e.g., two cycles of streptavidinmagnetic bead depletion, a cycle of binding of phage to Tie1-coatedbeads, ten cycles of washes, elution of bound phage, and propagation ofenriched phage for the next round. Phage bound to Tie1 -coated beadsafter ten washes can be directly amplified or eluted beforeamplification. After three rounds of selection, individual clones may begrown in 96-well microtiter plates and individually screened for Tie1binding activity by phage ELISA. ELISAs can include evaluations ofbinding to Tie1, specificity controls, and unrelated controls. Isolatescan be DNA fingerprinted to determine the diversity emerging from theselection process. For example, positive isolates can be PCR amplifiedwith the oligonucleotide primers M13-reverse and geneIII-forward (see,e.g., Marks et al. (1991), J. Mol. Biol. 222:581). The products can beanalyzed by BstNI fingerprinting.

An exemplary method for performing ELISA's with phage that display abinding protein is as follows. Individual clones can be grown andrescued as described previously (Marks et al. (1991), J. Mol. Biol.222:581). For ELISAs, 96-well Immulon 2 HB plates (Thermo Labsystems)are coated with 1 μg/well ImmunoPure™ streptavidin (Pierce) in PBS andincubated overnight at 4° C. After three washes with PBS, 100 μL ofbiotinylated Tie1 protein is allowed to bind to the immobilizedstreptavidin for 30-60 minutes at room temperature. Then, Tie1-coatedwells are blocked with 300 μL of 2% milk/1×PBS/0.05% Tween (2% MPBST)for two hours at 37° C. The wells are incubated with 100 μL of phageculture supernatant that had been blocked with 2% MPBST for one hour atroom temperature. The wells are washed five times with 1×PBS/Tween 0.1%(PBST), and incubated with 100 μL of anti-M13-HRP secondary antibody ata 1:5,000 dilution for one hour at room temperature. The wells arewashed five times with PBST before developing with TMB-solution and readat 630 nm.

For the cell ELISAs, cells are washed once in PBS and resuspended at aconcentration of 1×10⁶ to 2×10⁶ cells/mL of PBS. A final concentrationof 1-2×10⁵ cells per well of a 96-well tissue culture plate (Falcon,VWR) can be used. The cells are fixed by adding an equal volume of 0.2%glutaraldehyde (Sigma-Aldrich) and incubating at 37° C. for 12 minutes.They are then washed three times with PBS using an automated platewasher (Bio-Tek Instruments, Inc.) and blocked with 200 μL of 2% MPBSTfor one hour at room temperature. The rest of the ELISA procedure can beperformed as described above except that 1×PBS/Tween 0.05% is used forthe washes and incubations.

Germlining Antibodies

It is possible to modify an antibody that binds Tie1, Tie2, or Ang,e.g., an antibody described herein, in order to make the variableregions of the antibody more similar to one or more germline sequences.For example, an antibody can include one, two, three or more amino acidsubstitutions, e.g., in a framework or CDR region, to make it moresimilar to a reference germline sequence. One exemplary germliningmethod can include: identifying one or more germline sequences that aresimilar (e.g., most similar in a particular database) to the sequence ofthe isolated antibody. Then mutations (at the amino acid level) can bemade in the isolated antibody, either incrementally, in combination, orboth. For example, a nucleic acid library that includes sequencesencoding some or all possible germline mutations is made. The mutatedantibodies are then evaluated, e.g., to identify an antibody that hasone or more additional germline residues relative to the isolatedantibody and that is still useful (e.g., has a functional activity). Inone embodiment, as many germline residues are introduced into anisolated antibody as possible.

In one embodiment, mutagenesis is used to substitute or insert one ormore germline residues into a CDR region. For example, the germline CDRresidue can be from a germline sequence that is similar (e.g., mostsimilar) to the variable region being modified. After mutagenesis,activity (e.g., binding or other functional activity) of the antibodycan be evaluated to determine if the germline residue or residues aretolerated. Similar mutagenesis can be performed in the frameworkregions.

Selecting a germline sequence can be performed in different ways. Forexample, a germline sequence can be selected if it meets a predeterminedcriteria for selectivity or similarity, e.g., at least a certainpercentage identity, e.g., at least 75, 80, 85, 90, 91, 92, 93, 94, 95,96, 97, 98, 99, or 99.5% identity. The selection can be performed usingat least 2, 3, 5, or 10 germline sequences. In the case of CDR1 andCDR2, identifying a similar germline sequence can include selecting onesuch sequence. In the case of CDR3, identifying a similar germlinesequence can include selecting one such sequence, but may includingusing two germline sequences that separately contribute to theamino-terminal portion and the carboxy-terminal portion. In otherimplementations more than one or two germline sequences are used, e.g.,to form a consensus sequence.

In one embodiment, with respect to a particular reference variabledomain sequence, e.g., a sequence described herein, a related variabledomain sequence has at at least 30, 40, 50, 60, 70, 80, 90, 95 or 100%of the CDR amino acid positions that are not identical to residues inthe reference CDR sequences, residues that are identical to residues atcorresponding positions in a human germline sequence (i.e., an aminoacid sequence encoded by a human germline nucleic acid).

In one embodiment, with respect to a particular reference variabledomain sequence, e.g., a sequence described herein, a related variabledomain sequence has at at least 30, 50, 60, 70, 80, 90 or 100% of the FRregions are identical to FR sequence from a human germline sequence,e.g., a germline sequence related to the reference variable domainsequence.

Accordingly, it is possible to isolate an antibody which has similaractivity to a given antibody of interest, but is more similar to one ormore germline sequences, particularly one or more human germlinesequences. For example, an antibody can be at least 90, 91, 92, 93, 94,95, 96, 97, 98, 99, 99.5% identical to a germline sequence in a regionoutside the CDRs (e.g., framework regions). Further an antibody caninclude at least 1, 2, 3, 4, or 5 germline residues in a CDR region, thegermline residue being from a germline sequence of similar (e.g., mostsimilar) to the variable region being modified. Germline sequences ofprimary interest are human germline sequences. The activity of theantibody (e.g., the binding activity) can be within a factor or 100, 10,5, 2, 0.5, 0.1, and 0.001 of the original antibody.

Exemplary germline reference sequences for Vkappa include: O12/O2,O18/O8, A20, A30, L14, L1, L15, L4/18a, L5/L19, L8, L23, L9, L24, L11,L12, O11/O1, A17, A1, A18, A2, A19/A3, A23, A27, A11, L2/L16, L6, L20,L25, B3, B2, A26/A10, and A14. See, e.g., Tomlinson et al. (1995) EMBOJ. 14(18):4628-3.

A germline reference sequence for the HC variable domain can be based ona sequence that has particular canonical structures, e.g., 1-3structures in the H1 and H2 hypervariable loops. The canonicalstructures of hypervariable loops of an immunoglobulin variable domaincan be inferred from its sequence, as described in Chothia et al. (1992)J. Mol. Biol. 227:799-817; Tomlinson et al. (1992) J. Mol. Biol.227:776-798); and Tomlinson et al. (1995) EMBO J. 14(18):4628-38.Exemplary sequences with a 1-3 structure include: DP-1, DP-8, DP-12,DP-2, DP-25, DP-15, DP-7, DP-4, DP-31, DP-32, DP-33, DP-35, DP-40, 7-2,hv3005, hv3005f3, DP-46, DP-47, DP-58, DP-49, DP-50, DP-51, DP-53, andDP-54.

Diversity

Display libraries and other libraries include variation at one or morepositions in the displayed polypeptide. The variation at a givenposition can be synthetic or natural. For some libraries, both syntheticand natural diversity are included.

Synthetic Diversity. Libraries can include regions of diverse nucleicacid sequence that originate from artificially synthesized sequences.Typically, these are formed from degenerate oligonucleotide populationsthat include a distribution of nucleotides at each given position. Theinclusion of a given sequence is random with respect to thedistribution. One example of a degenerate source of synthetic diversityis an oligonucleotide that includes NNN wherein N is any of the fournucleotides in equal proportion.

Synthetic diversity can also be more constrained, e.g., to limit thenumber of codons in a nucleic acid sequence at a given trinucleotide toa distribution that is smaller than NNN. For example, such adistribution can be constructed using less than four nucleotides at somepositions of the codon. In addition, trinucleotide addition technologycan be used to further constrain the distribution. So-called“trinucleotide addition technology” is described, e.g., in Wells et al.(1985) Gene 34:315-323, U.S. Pat. No. 4,760,025 and U.S. Pat. No.5,869,644.

Natural Diversity. Libraries can include regions of diverse nucleic acidsequence that originate (or are synthesized based on) from differentnaturally-occurring sequences. An example of natural diversity that canbe included in a display library is the sequence diversity present inimmune cells (see also below). Nucleic acids are prepared from theseimmune cells and are manipulated into a format for polypeptide display.

Antibody Display Libraries

In one embodiment, the display library presents a diverse pool ofproteins, each of which includes an immunoglobulin domain, e.g., animmunoglobulin variable domain. Display libraries are particular useful,for example for identifying human or “humanized” antibodies thatrecognize human antigens. Such antibodies can be used as therapeutics totreat human disorders such as endothelial-related disorders, e.g.,metastatic cancer. Since the constant and framework regions of theantibody are human, these therapeutic antibodies may avoid themselvesbeing recognized and targeted as antigens. The constant regions are alsooptimized to recruit effector functions of the human immune system. Thein vitro display selection process surmounts the inability of a normalhuman immune system to generate antibodies against self-antigens.

A typical antibody display library displays a polypeptide that includesa VH domain and a VL domain. An “immunoglobulin domain” refers to adomain from the variable or constant domain of immunoglobulin molecules.Immunoglobulin domains typically contain two β-sheets formed of aboutseven β-strands, and a conserved disulphide bond (see, e.g., A. F.Williams and A. N. Barclay 1988 Ann. Rev Immunol. 6:381-405). Thecanonical structures of hypervariable loops of an immunoglobulinvariable can be inferred from its sequence, as described in Chothia etal. (1992) J. Mol. Biol. 227:799-817; Tomlinson et al. (1992) J. Mol.Biol. 227:776-798); and Tomlinson et al. (1995) EMBO J. 14(18):4628-38.The display library can display the antibody as a Fab fragment (e.g.,using two polypeptide chains) or a single chain Fv (e.g., using a singlepolypeptide chain). Other formats can also be used.

As in the case of the Fab and other formats, the displayed antibody caninclude a constant region as part of a light or heavy chain. In oneembodiment, each chain includes one constant region, e.g., as in thecase of a Fab. In other embodiments, additional constant regions aredisplayed.

Antibody libraries can be constructed by a number of processes (see,e.g., de Haard et al. (1999) J. Biol. Chem 274:18218-30; Hoogenboom etal. (1998) Immunotechnology 4:1-20. and Hoogenboom et al. (2000) ImmunolToday 21:371-8). Further, elements of each process can be combined withthose of other processes. The processes can be used such that variationis introduced into a single immunoglobulin domain (e.g., VH or VL) orinto multiple immunoglobulin domains (e.g., VH and VL). The variationcan be introduced into an immunoglobulin variable domain, e.g., in theregion of one or more of CDR1, CDR2, CDR3, FR1, FR2, FR3, and FR4,referring to such regions of either and both of heavy and light chainvariable domains. In one embodiment, variation is introduced into allthree CDRs of a given variable domain. In another preferred embodiment,the variation is introduced into CDR1 and CDR2, e.g., of a heavy chainvariable domain. Any combination is feasible. [0324] In one process,antibody libraries are constructed by inserting diverse oligonucleotidesthat encode CDRs into the corresponding regions of the nucleic acid. Theoligonucleotides can be synthesized using monomeric nucleotides ortrinucleotides. For example, Knappik et al. (2000) J. Mol. Biol.296:57-86 describe a method for constructing CDR encodingoligonucleotides using trinucleotide synthesis and a template withengineered restriction sites for accepting the oligonucleotides.

In another process, an animal, e.g., a non-human animal, e.g., a rodent,is immunized with the Tie1. The animal is optionally boosted with theantigen to further stimulate the response. Then spleen cells areisolated from the animal, and nucleic acid encoding VH and/or VL domainsis amplified and cloned for expression in the display library. Thenon-human animal can include one or more human immunoglobulin genesequences. For example, the animal can include a complete humanimmunoglobulin locus. The animal may also have an inactivated endogenousimmunoglobulin locus.

In yet another process, antibody libraries are constructed from nucleicacid amplified from na{dot over (i)}ve germline immunoglobulin genes(e.g., human genes). The amplified nucleic acid includes nucleic acidencoding the VH and/or VL domain. Sources of immunoglobulin-encodingnucleic acids are described below. Amplification can include PCR, e.g.,with primers that anneal to the conserved constant region, or anotheramplification method.

Nucleic acid encoding immunoglobulin domains or fragments thereof can beobtained from the immune cells of, e.g., a human, a primate, mouse,rabbit, camel, or rodent. In one example, the cells are selected for aparticular property. B cells at various stages of maturity can beselected. In another example, the B cells are na{dot over (i)}ve.

In one embodiment, fluorescent-activated cell sorting (FACS) is used tosort B cells that express surface-bound IgM, IgD, or IgG molecules.Further, B cells expressing different isotypes of IgG can be isolated.In another preferred embodiment, the B or T cell is cultured in vitro.The cells can be stimulated in vitro, e.g., by culturing with feedercells or by adding mitogens or other modulatory reagents, such asantibodies to CD40, CD40 ligand or CD20, phorbol myristate acetate,bacterial lipopolysaccharide, concanavalin A, phytohemagglutinin orpokeweed mitogen.

In still another embodiment, the cells are isolated from a subject thathas an immunological disorder, e.g., systemic lupus erythematosus (SLE),rheumatoid arthritis, vasculitis, Sjogren syndrome, systemic sclerosis,or anti-phospholipid syndrome. The subject can be a human, or an animal,e.g., an animal model for the human disease, or an animal having ananalogous disorder. In yet another embodiment, the cells are isolatedfrom a transgenic non-human animal that includes a human immunoglobulinlocus.

In one preferred embodiment, the cells have activated a program ofsomatic hypermutation. Cells can be stimulated to undergo somaticmutagenesis of immunoglobulin genes, for example, by treatment withanti-immunoglobulin, anti-CD40, and anti-CD38 antibodies (see, e.g.,Bergthorsdottir et al. (2001) J Immunol. 166:2228). In anotherembodiment, the cells are na{dot over (i)}ve.

The nucleic acid encoding an immunoglobulin variable domain can beisolated from a natural repertoire by the following exemplary method.First, RNA is isolated from the immune cell. Full length (i.e., capped)mRNAs are separated (e.g. by dephosphorylating uncapped RNAs with calfintestinal phosphatase). The cap is then removed with tobacco acidpyrophosphatase and reverse transcription is used to produce the cDNAs.

The reverse transcription of the first (antisense) strand can be done inany manner with any suitable primer. See, e.g., de Haard et al. (1999)J. Biol. Chem 274:18218-30. The primer binding region can be constantamong different immunoglobulins, e.g., in order to reverse transcribedifferent isotypes of immunoglobulin. The primer binding region can alsobe specific to a particular isotype of immunoglobulin. Typically, theprimer is specific for a region that is 3’ to a sequence encoding atleast one CDR. In another embodiment, poly-dT primers may be used (andmay be preferred for the heavy-chain genes).

A synthetic sequence can be ligated to the 3′ end of the reversetranscribed strand. The synthetic sequence can be used as a primerbinding site for binding of the forward primer during PCR amplificationafter reverse transcription. The use of the synthetic sequence canobviate the need to use a pool of different forward primers to fullycapture the available diversity.

The variable domain-encoding gene is then amplified, e.g., using one ormore rounds. If multiple rounds are used, nested primers can be used forincreased fidelity. The amplified nucleic acid is then cloned into adisplay library vector.

Any method for amplifying nucleic acid sequences may be used foramplification. Methods that maximize and do not bias diversity arepreferred. A variety of techniques can be used for nucleic acidamplification. The polymerase chain reaction (PCR; U.S. Pat. Nos.4,683,195 and 4,683,202, Saiki, et al. (1985) Science 230, 1350-1354)utilizes cycles of varying temperature to drive rounds of nucleic acidsynthesis. Transcription-based methods utilize RNA synthesis by RNApolymerases to amplify nucleic acid (U.S. Pat. No 6,066,457; U.S. Pat.No 6,132,997; U.S. Pat. No 5,716,785; Sarkar et. al., Science (1989)244: 331-34 ; Stofler et al., Science (1988) 239: 491). NASBA (U.S. Pat.Nos. 5,130,238; 5,409,818; and 5,554,517) utilizes cycles oftranscription, reverse-transcription, and RNaseH-based degradation toamplify a DNA sample. Still other amplification methods include rollingcircle amplification (RCA; U.S. Pat. Nos. 5,854,033 and 6,143,495) andstrand displacement amplification (SDA; U.S. Pat. Nos. 5,455,166 and5,624,825).

Secondary Screening Methods

After selecting candidate display library members that bind to a target,each candidate display library member can be further analyzed, e.g., tofurther characterize its binding properties for the target. Similarlycandidate binding proteins (e.g., by immunization, etc.) obtained byother methods can also be analyzed. Each candidate binding protein canbe subjected to one or more secondary screening assays. The assay can befor a binding property, a catalytic property, a physiological property(e.g., cytotoxicity, renal clearance, immunogenicity), a structuralproperty (e.g., stability, conformation, oligomerization state) oranother functional property. The same assay can be used repeatedly, butwith varying conditions, e.g., to determine pH, ionic, or thermalsensitivities.

As appropriate, the assays can use the display library member directly,a recombinant polypeptide produced from the nucleic acid encoding adisplayed polypeptide, or a synthetic peptide synthesized based on thesequence of a displayed polypeptide. Exemplary assays for bindingproperties include the following.

ELISA. Proteins encoded by a display library can also be screened for abinding property using an ELISA assay. For example, each protein iscontacted to a microtitre plate whose bottom surface has been coatedwith the target, e.g., a limiting amount of the target. The plate iswashed with buffer to remove non-specifically bound polypeptides. Thenthe amount of the protein bound to the plate is determined by probingthe plate with an antibody that can recognize the polypeptide, e.g., atag or constant portion of the polypeptide. The antibody is linked to anenzyme such as alkaline phosphatase, which produces a colorimetricproduct when appropriate substrates are provided. The protein can bepurified from cells or assayed in a display library format, e.g., as afusion to a filamentous bacteriophage coat. Alternatively, cells (e.g.,live or fixed) that express the target molecule, e.g., Tie1, Tie2, orAng, can be plated in a microtitre plate and used to test the affinityof the peptides/antibodies present in the display library or obtained byselection from the display library.

Cell Binding Assays. Binding proteins (e.g., Tie1, Tie2, or Ang bindingproteins) can be evaluated for their ability to interact with one ormore cell types, e.g., endothelial cells or platelets. Fluorescentactivated cell sorting (FACS) is one exemplary method for testing aninteraction between a protein and a cell. The binding protein is labeleddirectly or indirectly with a fluorophore, before or after, binding tothe cells, and then cells are counted in a FACS sorter.

For example, the following method can be used to evaluate whether a Tie1binding protein interacts with platelets or other cell types.

Isolation of Platelets. Human blood can be obtained from informedhealthy volunteers. For example, venous blood is collected intoone-sixth volume of ACD (2.5 g of sodium citrate, 1.5 g citric acid, and2.5 g glucose in 100 ml dH₂O). The blood is centrifuged at 800×g for 15min at room temperature and the platelet-rich plasma is removed andincubated for 60 min at 37° C. in the presence of 1 mM acetylsalicylicacid followed by centrifugation at 1000×g for 10 min at roomtemperature. The platelet pellet can be resuspended at a density of2×10⁸ cells/ml with HEPES-buffered Tyrode's solution (137 mM NaCl, 2.7mM KCl, 1 mM MgCl₂, 3 mM NaH₂PO₄, 5 mM glucose, 10 mM HEPES pH 7.4, 0.2%bovine serum albumin, and 0.05 U/mL apyrase). See also, e.g., Komecki etal. (1990) J Biol Chem. 265:10,042-10,048 and Naik et al. (1995) BiochemJ. 310:155-162).

FACS. For example, for FACS analysis of platelets, cells can beresuspended in 0.1% BSA/PBS (4×10⁵ cells/sample) in the presence of PGE1(1 mg/mL) and incubated with a candidate Tie1 binding protein (e.g., atabout 5 μg/mL) or with a control. After a 1-hour incubation at 22° C.,the cells are washed with 0.1% BSA/PBS, treated with 50 μL 1/100 dilutedFITC-labeled secondary antibody, incubated for 30 minutes on ice,washed, and resuspended in 0.1% BSA/PBS. The samples are analyzed usingan Immunocytometry Systems flow cytometer (FACSORT™, Becton Dickinson,San Jose, Calif.). See also, e.g., Malgorzata et al. (2000) Blood, Vol.95 No. 8 (April 15 pp. 2600-2609.

In addition, it is possible to evaluate platelets by Westerns analysisof SDS-page separated proteins from isolated platelets and byimmunoprecipitation. Still other methods involve binding cells tosurfaces to which the Tie1-binding protein is attached (e.g., coatedto).

Other cell types can be prepared for FACS by methods known in the art.

Homogeneous Binding Assays. The binding interaction of candidatepolypeptide with a target can be analyzed using a homogenous assay,i.e., after all components of the assay are added, additional fluidmanipulations are not required. For example, fluorescence resonanceenergy transfer (FRET) can be used as a homogenous assay (see, forexample, Lakowicz et al., U.S. Pat. No. 5,631,169; Stavrianopoulos, etal., U.S. Pat. No. 4,868,103). A fluorophore label on the first molecule(e.g., the molecule identified in the fraction) is selected such thatits emitted fluorescent energy can be absorbed by a fluorescent label ona second molecule (e.g., the target) if the second molecule is inproximity to the first molecule. The fluorescent label on the secondmolecule fluoresces when it absorbs to the transferred energy. Since theefficiency of energy transfer between the labels is related to thedistance separating the molecules, the spatial relationship between themolecules can be assessed. In a situation in which binding occursbetween the molecules, the fluorescent emission of the ‘acceptor’molecule label in the assay should be maximal. A binding event that isconfigured for monitoring by FRET can be conveniently measured throughstandard fluorometric detection means well known in the art (e.g., usinga fluorimeter). By titrating the amount of the first or second bindingmolecule, a binding curve can be generated to estimate the equilibriumbinding constant.

Surface Plasmon Resonance (SPR). The binding interaction of a moleculeisolated from a display library and a target can be analyzed using SPR.SPR or Biomolecular Interaction Analysis (BIA) detects biospecificinteractions in real time, without labeling any of the interactants.Changes in the mass at the binding surface (indicative of a bindingevent) of the BIA chip result in alterations of the refractive index oflight near the surface (the optical phenomenon of surface plasmonresonance (SPR)). The changes in the refractivity generate a detectablesignal, which are measured as an indication of real-time reactionsbetween biological molecules. Methods for using SPR are described, forexample, in U.S. Pat. No. 5,641,640; Raether (1988) Surface PlasmonsSpringer Verlag; Sjolander and Urbaniczky (1991) Anal. Chem.63:2338-2345; Szabo et al. (1995) Curr. Opin. Struct. Biol. 5:699-705and on-line resources provide by BlAcore International AB (Uppsala,Sweden).

Information from SPR can be used to provide an accurate and quantitativemeasure of the equilibrium dissociation constant (K_(d)), and kineticparameters, including K_(on) and K_(off), for the binding of abiomolecule to a target. Such data can be used to compare differentbiomolecules. For example, different proteins can be compared toidentify individuals that have high affinity for the target or that havea slow K_(off). This information can also be used to developstructure-activity relationships (SAR). For example, the kinetic andequilibrium binding parameters of matured versions of a parent proteincan be compared to the parameters of the parent protein. Variant aminoacids at given positions can be identified that correlate withparticular binding parameters, e.g., high affinity and slow K_(off).This information can be combined with structural modeling (e.g., usinghomology modeling, energy minimization, or structure determination bycrystallography or NMR). As a result, an understanding of the physicalinteraction between the protein and its target can be formulated andused to guide other design processes.

Protein Arrays. Proteins identified from the display library can beimmobilized on a solid support, for example, on a bead or an array. Fora protein array, each of the polypeptides is immobilized at a uniqueaddress on a support. Typically, the address is a two-dimensionaladdress. Protein arrays are described below (see, e.g., Diagnostics). Itis also possible to use a protein array to evaluate any plurality ofproteins, e.g., for interaction with Tie1, Tie2, or Ang.

Cellular Assays. Candidate proteins can be selected from a library bytransforming the library into a host cell; the library could have beenpreviously identified from a display library. For example, the librarycan include vector nucleic acid sequences that include segments thatencode the polypeptides and that direct expression, e.g., such that theproteins are produced within the cell, secreted from the cell, orattached to the cell surface. The cells can be screened or selected forproteins that bind to the Tie1, Tie2, or Ang, e.g., as detected by achange in a cellular phenotype or a cell-mediated activity. For example,in the case of an antibody that binds to Tie1, the activity may beautophosphorylation, activation of PI3 Kinase, activation of AKT, or achange in endothelial cell activity (e.g., proliferation).

In another embodiment, the library of cells is in the form of a cellulararray. The cellular array can likewise be screened for any appropriatedetectable activity. In other embodiments, competition binding assaysare used to identify proteins that are compete with a reference proteinfor binding to Tie1. Similarly, epitope mapping can be used to identifyproteins that bind to a particular epitope of Tie. Fragments and mutantsof Tie1 can be also be used in the binding protein-identificationprocess, e.g., in one or more of characterization, screening, orimmunization.

Methods for Obtaining Target-Binding Antibodies

In addition to the use of display libraries, other methods can be usedto obtain a target-binding antibody or in combination with the use ofdisplay libraries. For example, the Tie1 ectodomain or a region thereofcan be used as an antigen in a non-human animal, e.g., a rodent.Similarly, Tie2 or Ang, or a region thereof can be used as an antigen ina non-human animal, e.g., a rodent.

In one embodiment, the non-human animal includes at least a part of ahuman immunoglobulin gene. For example, it is possible to engineer mousestrains deficient in mouse antibody production with large fragments ofthe human Ig loci. Using the hybridoma technology, antigen-specific Mabsderived from the genes with the desired specificity may be produced andselected. See, e.g., XenoMouse™, Green et al. Nature Genetics 7:13-21(1994), U.S. 20030070185, WO 96/34096, published Oct. 31, 1996, and PCTApplication No. PCT/US96/05928, filed Apr. 29, 1996.

In another embodiment, a monoclonal antibody is obtained from thenon-human animal, and then modified, e.g., humanized or deimmunized.Winter describes a CDR-grafting method that may be used to prepare thehumanized antibodies (UK Patent Application GB 2188638A, filed on Mar.26, 1987; Winter U.S. Pat. No. 5,225,539. All of the CDRs of aparticular human antibody may be replaced with at least a portion of anon-human CDR or only some of the CDRs may be replaced with non-humanCDRs. It is only necessary to replace the number of CDRs required forbinding of the humanized antibody to a predetermined antigen.

Humanized antibodies can be generated by replacing sequences of the Fvvariable region that are not directly involved in antigen binding withequivalent sequences from human Fv variable regions. General methods forgenerating humanized antibodies are provided by Morrison, S. L., 1985,Science 229:1202-1207, by Oi et al., 1986, BioTechniques 4:214, and byQueen et al. U.S. Pat. No. 5,585,089, U.S. Pat. No. 5,693,761 and U.S.Pat. No. 5,693,762. Those methods include isolating, manipulating, andexpressing the nucleic acid sequences that encode all or part ofimmunoglobulin Fv variable regions from at least one of a heavy or lightchain. Sources of such nucleic acid are well known to those skilled inthe art and, for example, may be obtained from a hybridoma producing anantibody against a predetermined target, as described above. Therecombinant DNA encoding the humanized antibody, or fragment thereof,can then be cloned into an appropriate expression vector.

A target-binding antibody may also be modified by specific deletion ofhuman T cell epitopes or “deimmunization” by the methods disclosed in WO98/52976 and WO 00/34317, the contents of which are specificallyincorporated by reference herein. Briefly, the heavy and light chainvariable regions of an antibody can be analyzed for peptides that bindto MHC Class II; these peptides represent potential T-cell epitopes (asdefined in WO 98/52976 and WO 00/34317). For detection of potentialT-cell epitopes, a computer modeling approach termed “peptide threading”can be applied, and in addition a database of human MHC class II bindingpeptides can be searched for motifs present in the V_(H) and V_(L)sequences, as described in WO 98/52976 and WO 00/34317. These motifsbind to any of the 18 major MHC class II DR allotypes, and thusconstitute potential T cell epitopes. Potential T-cell epitopes detectedcan be eliminated by substituting small numbers of amino acid residuesin the variable regions, or preferably, by single amino acidsubstitutions. As far as possible conservative substitutions are made,often but not exclusively, an amino acid common at this position inhuman germline antibody sequences may be used. Human germline sequencesare disclosed in Tomlinson, I. A. et al. (1992) J. Mol. Biol.227:776-798; Cook, G. P. et al. (1995) Immunol. Today Vol. 16 (5):237-242; Chothia, D. et al. (1992) J. Mol. Bio. 227:799-817. The V BASEdirectory provides a comprehensive directory of human immunoglobulinvariable region sequences (compiled by Tomlinson, I. A. et al. MRCCentre for Protein Engineering, Cambridge, UK). After the deimmunizingchanges are identified, nucleic acids encoding V_(H) and V_(L) can beconstructed by mutagenesis or other synthetic methods (e.g., de novosynthesis, cassette replacement, and so forth). Mutagenized variablesequence can, optionally, be fused to a human constant region, e.g.,human IgG1 or κ constant regions.

In some cases a potential T cell epitope will include residues which areknown or predicted to be important for antibody function. For example,potential T cell epitopes are usually biased towards the CDRs. Inaddition, potential T cell epitopes can occur in framework residuesimportant for antibody structure and binding. Changes to eliminate thesepotential epitopes will in some cases require more scrutiny, e.g., bymaking and testing chains with and without the change. Where possible,potential T cell epitopes that overlap the CDRs were eliminated bysubstitutions outside the CDRs. In some cases, an alteration within aCDR is the only option, and thus variants with and without thissubstitution should be tested. In other cases, the substitution requiredto remove a potential T cell epitope is at a residue position within theframework that might be critical for antibody binding. In these cases,variants with and without this substitution should be tested. Thus, insome cases several variant deimmunized heavy and light chain variableregions were designed and various heavy/light chain combinations testedin order to identify the optimal deimmunized antibody. The choice of thefinal deimmunized antibody can then be made by considering the bindingaffinity of the different variants in conjunction with the extent ofdeimmunization, i.e., the number of potential T cell epitopes remainingin the variable region. Deimmunization can be used to modify an antibodythat includes a non-human sequence, e.g., a murine antibody or othernon-human monoclonal antibody. Deimmunization can be used to modify anantibody isolated from a display library.

Endothelial Cell Assays

A target-binding protein or a candidate binding protein can becharacterized using a cellular assay, e.g., to evaluate a change in acellular phenotype or other activity when the binding protein iscontacted to the cell. Typically the cell is expresses a protein thatincludes at least part of the ectodomain of Tie. In some embodiments,the cell expresses Tie1, e.g., a full-length, mature Tie1 protein, Tie2,and/or is contacted with Ang.

Endothelial cell proliferation. A candidate target-binding protein canbe tested for endothelial proliferation inhibiting activity using abiological activity assay such as the bovine capillary endothelial cellproliferation assay, the chick CAM assay, the mouse corneal assay, andevaluating the effect of the binding protein on implanted tumors. Thechick CAM assay is described, e.g., by O'Reilly, et al. in “AngiogenicRegulation of Metastatic Growth” Cell, vol. 79 (2), Oct. 21, 1994, pp.315-328. Briefly, three day old chicken embryos with intact yolks areseparated from the egg and placed in a petri dish. After three days ofincubation a methylcellulose disc containing the protein to be tested isapplied to the CAM of individual embryos. After 48 hours of incubation,the embryos and CAMs are observed to determine whether endothelialgrowth has been inhibited. The mouse corneal assay involves implanting agrowth factor-containing pellet, along with another pellet containingthe suspected endothelial growth inhibitor, in the cornea of a mouse andobserving the pattern of capillaries that are elaborated in the cornea.

Angiogenesis. Angiogenesis may be assayed , e.g., using various humanendothelial cell systems, such as umbilical vein, coronary artery, ordermal cells. Suitable assays include Alamar Blue based assays(available from Biosource International) to measure proliferation;migration assays using fluorescent molecules, such as the use of BectonDickinson Falcon HTS FLUOROBLOCK™ cell culture inserts to measuremigration of cells through membranes in presence or absence ofangiogenesis enhancer or suppressors; and tubule formation assays basedon the formation of tubular structures by endothelial cells on MATRIGEL™(Becton Dickinson) or collagen I.

Cell adhesion. Cell adhesion assays measure adhesion of cells topurified adhesion proteins or adhesion of cells to each other, inpresence or absence of candidate target-binding proteins. Cell-proteinadhesion assays measure the ability of agents to modulate the adhesionof cells to purified proteins. For example, recombinant proteins areproduced, diluted to 2.5 g/mL in PBS, and used to coat the wells of amicrotiter plate. The wells used for negative control are not coated.Coated wells are then washed, blocked with 1% BSA, and washed again.Compounds are diluted to 2 x final test concentration and added to theblocked, coated wells. Cells are then added to the wells, and theunbound cells are washed off. Retained cells are labeled directly on theplate by adding a membrane-permeable fluorescent dye, such ascalcein-AM, and the signal is quantified in a fluorescent microplatereader.

Cell-cell adhesion assays can be used to measure the ability ofcandidate target-binding proteins to modulate binding of cells to eachother. These assays can use cells that naturally or recombinantlyexpress an adhesion protein of choice. In an exemplary assay, cellsexpressing the cell adhesion protein are plated in wells of a multiwellplate together with other cells (either more of the same cell type, oranother type of cell to which the cells adhere). The cells that canadhere are labeled with a membrane-permeable fluorescent dye, such asBCECF, and allowed to adhere to the monolayers in the presence ofcandidate binding proteins. Unbound cells are washed off, and boundcells are detected using a fluorescence plate reader. High-throughputcell adhesion assays have also been described. See, e.g., Falsey J R etal., Bioconjug Chem. May-June 2001;12(3):346-53.

Tubulogenesis. Tubulogenesis assays can be used to monitor the abilityof cultured cells, generally endothelial cells, to form tubularstructures on a matrix substrate, which generally simulates theenvironment of the extracellular matrix. Exemplary substrates includeMATRIGEL™ (Becton Dickinson), an extract of basement membrane proteinscontaining laminin, collagen IV, and heparin sulfate proteoglycan, whichis liquid at 4° C. and forms a solid gel at 37° C. Other suitablematrices comprise extracellular components such as collagen,fibronectin, and/or fibrin. Cells are stimulated with a pro-angiogenicstimulant, and their ability to form tubules is detected by imaging.Tubules can generally be detected after an overnight incubation withstimuli, but longer or shorter time frames may also be used. Tubeformation assays are well known in the art (e.g., Jones M K et al.,1999, Nature Medicine 5:1418-1423). These assays have traditionallyinvolved stimulation with serum or with the growth factors FGF or VEGF.In one embodiment, the assay is performed with cells cultured in serumfree medium. In one embodiment, the assay is performed in the presenceof one or more pro-angiogenic agents, e.g., inflammatory angiogenicfactors such as TNF-α, or FGF, VEGF, phorbol myristate acetate (PMA),TNF-alpha, ephrin, etc.

Cell Migration. An exemplary assay for endothelial cell migration is thehuman microvascular endothelial (HMVEC) migration assay. See, e.g.,Tolsma et al. (1993) J. Cell Biol 122, 497-511. Migration assays areknown in the art (e.g., Paik J H et al., 2001, J Biol Chem276:11830-11837). In one example, cultured endothelial cells are seededonto a matrix-coated porous lamina, with pore sizes generally smallerthan typical cell size. The lamina is typically a membrane, such as thetranswell polycarbonate membrane (Corning Costar Corporation, Cambridge,Mass.), and is generally part of an upper chamber that is in fluidcontact with a lower chamber containing pro-angiogenic stimuli.Migration is generally assayed after an overnight incubation withstimuli, but longer or shorter time frames may also be used. Migrationis assessed as the number of cells that crossed the lamina, and may bedetected by staining cells with hemotoxylin solution (VWR Scientific.),or by any other method for determining cell number. In another exemplaryset up, cells are fluorescently labeled and migration is detected usingfluorescent readings, for instance using the Falcon HTS FLUOROBLOK™(Becton Dickinson). While some migration is observed in the absence ofstimulus, migration is greatly increased in response to pro-angiogenicfactors. The assay can be used to test the effect of a target-bindingprotein on endothelial cell migration.

Sprouting assay. An exemplary sprouting assay is a three-dimensional invitro angiogenesis assay that uses a cell-number defined spheroidaggregation of endothelial cells (“spheroid”), embedded in a collagengel-based matrix. The spheroid can serve as a starting point for thesprouting of capillary-like structures by invasion into theextracellular matrix (termed “cell sprouting”) and the subsequentformation of complex anastomosing networks (Korff and Augustin, 1999, JCell Sci 112:3249-58). In an exemplary experimental set-up, spheroidsare prepared by pipetting 400 human umbilical vein endothelial cellsinto individual wells of a nonadhesive 96-well plates to allow overnightspheroidal aggregation (Korff and Augustin: J Cell Biol 143: 1341-52,1998). Spheroids are harvested and seeded in 900 μl of methocel-collagensolution and pipetted into individual wells of a 24 well plate to allowcollagen gel polymerization. Test agents are added after 30 min bypipetting 100 μl of 10-fold concentrated working dilution of the testsubstances on top of the gel. Plates are incubated at 37° C. for 24 h.Dishes are fixed at the end of the experimental incubation period byaddition of paraformaldehyde. Sprouting intensity of endothelial cellscan be quantitated by an automated image analysis system to determinethe cumulative sprout length per spheroid.

In some embodiments, a target-binding protein has a statisticallysignificant effect on an assay described herein, e.g., a cellular assaydescribed herein.

Protein Production

Standard recombinant nucleic acid methods can be used to express abinding protein that binds to Tie1, Tie2, or Ang. See, for example, thetechniques described in Sambrook & Russell, Molecular Cloning: ALaboratory Manual, 3^(rd) Edition, Cold Spring Harbor Laboratory, N.Y.(2001) and Ausubel et al., Current Protocols in Molecular Biology(Greene Publishing Associates and Wiley Interscience, N.Y. (1989).Generally, a nucleic acid sequence encoding the binding proteinis clonedinto a nucleic acid expression vector. If the protein includes multiplepolypeptide chains, each chain can be cloned into an expression vector,e.g., the same or different vectors, that are expressed in the same ordifferent cells. Methods for producing antibodies are also providedbelow.

Antibody Production. Some antibodies, e.g., Fabs, can be produced inbacterial cells, e.g., E. coli cells. For example, if the Fab is encodedby sequences in a phage display vector that includes a suppressible stopcodon between the display entity and a bacteriophage protein (orfragment thereof), the vector nucleic acid can be shuffled into abacterial cell that cannot suppress a stop codon. In this case, the Fabis not fused to the gene III protein and is secreted into the media.

Antibodies can also be produced in eukaryotic cells. In one embodiment,the antibodies (e.g., scFv's) are expressed in a yeast cell such asPichia (see, e.g., Powers et al. (2001) J Immunol Methods. 251:123-35),Hanseula, or Saccharomyces.

In one embodiment, antibodies are produced in mammalian cells. Preferredmammalian host cells for expressing the clone antibodies orantigen-binding fragments thereof include Chinese Hamster Ovary (CHOcells) (including dhfr− CHO cells, described in Urlaub and Chasin (1980)Proc. Natl. Acad. Sci. USA 77:4216-4220, used with a DHFR selectablemarker, e.g., as described in Kaufman and Sharp (1982) Mol. Biol.159:601-621), lymphocytic cell lines, e.g., NSO myeloma cells, SP2cells, COS cells, HEK 293T cells, and a cell from a transgenic animal,e.g., a transgenic mammal. For example, the cell is a mammary epithelialcell.

In addition to the nucleic acid sequence encoding the immunoglobulindomain, the recombinant expression vectors may carry additionalsequences, such as sequences that regulate replication of the vector inhost cells (e.g., origins of replication) and selectable marker genes.The selectable marker gene facilitates selection of host cells intowhich the vector has been introduced (see e.g., U.S. Pats. Nos.4,399,216, 4,634,665 and 5,179,017). For example, typically theselectable marker gene confers resistance to drugs, such as G418,hygromycin or methotrexate, on a host cell into which the vector hasbeen introduced. Preferred selectable marker genes include thedihydrofolate reductase (DHFR) gene (for use in dhfr⁻ host cells withmethotrexate selection/amplification) and the neo gene (for G418selection). Another exemplary expression system is the glutaminesynthase (GS) vector system available from Lonza Group Ltd. CH (see,e.g., Clark et al. (2004) BioProcess International 2(4):48-52; Barnes etal. (2002) Biotech Bioeng. 81(6):631-639).

In an exemplary system for recombinant expression of an antibody, orantigen-binding portion thereof, a recombinant expression vectorencoding both the antibody heavy chain and the antibody light chain isintroduced into dhfr− CHO cells by calcium phosphate-mediatedtransfection. Within the recombinant expression vector, the antibodyheavy and light chain genes are each operatively linked toenhancer/promoter regulatory elements (e.g., derived from SV40, CMV,adenovirus and the like, such as a CMV enhancer/AdMLP promoterregulatory element or an SV40 enhancer/AdMLP promoter regulatoryelement) to drive high levels of transcription of the genes. Therecombinant expression vector also carries a DHFR gene, which allows forselection of CHO cells that have been transfected with the vector usingmethotrexate selection/amplification. The selected transformant hostcells are cultured to allow for expression of the antibody heavy andlight chains and intact antibody is recovered from the culture medium.Standard molecular biology techniques are used to prepare therecombinant expression vector, transfect the host cells, select fortransformants, culture the host cells and recover the antibody from theculture medium. For example, some antibodies can be isolated by affinitychromatography with a Protein A or Protein G.

The codon usage can adapted to the codon bias of the host cell, e.g.,for CHO cells it can be adapted for the codon bias Cricetulus griseusgenes. In addition, regions of very high (>80%) or very low (<30%) GCcontent can be avoid avoided where possible. During the optimizationprocess following cis-acting sequence motifs were avoided: internalTATA-boxes; chi-sites and ribosomal entry sites; AT-rich or GC-richsequence stretches; ARE, INS, CRS sequence elements; repeat sequencesand RNA secondary structures; and (cryptic) splice donor and acceptorsites, branch points. Two STOP codons can be used to ensure efficienttermination. The codon optimization of the sequence can be evaluatedaccording to Sharp, P. M., Li, W. H., Nucleic Acids Res. 15 (3), 1987).The standard codon adaptation index (CAI) can be used. Rare codonsinclude those with a quality class between 0-40.

The invention features isolated nucleic acid molecules that are alteredrelative to a sequence described herein, e.g., to include improvedcodons or sequence features, include an isolated nucleic acid moleculethat comprises a heavy or light chain coding sequence. For example, atleast 30, 40, 45, 50, 60, 65, 70, 75, or 80% of the codons in the heavyor light chain coding sequence are non-rare or frequent codons in amammalian cell or the heavy or light chain coding sequence includesfewer than 50, 45, 40, 35, 30, 25, 20, 15, 10% rare codons in amammalian cell, e.g., a Chinese hamster cell (Cricetulus griseus). Inone embodiment, the codon adaptation index is greater than 0.6, 0.7,0.8, 0.85, 0.90, 0.92, 0.94, 0.95, 0.96, 0.97, or 0.98.

In one embodiment, the heavy chain coding sequence encodes (i) apolypeptide comprising an antibody heavy chain described herein (e.g.,an E3 heavy chain as set forth in SEQ ID NO:723), (ii) a polypeptide atleast 85, 90, 95, 96, 97, 98, or 99% identical to an antibody heavychain coding sequence described herein (e.g., SEQ ID NO:723), or (iii) apolypeptide that comprises a heavy chain variable domain sequence havingthe CDRs of an antibody heavy chain variable domain described herein(e.g., an E3 heavy chain variable domain). In one embodiment, the heavychain coding sequence differs from SEQ ID NO:703 at at least 2, 3, 5, 6,8, 9, 10, or 15 codons.

In one embodiment, the light chain coding sequence encodes (i) apolypeptide comprising an antibody light chain described herein (e.g.,an E3 light chain as set forth in SEQ ID NO:724), (ii) a polypeptide atleast 85, 90, 95, 96, 97, 98, or 99% identical to an antibody lightchain coding sequence described herein (e.g., SEQ ID NO:724), or (iii) apolypeptide that comprises a light chain variable domain sequence havingthe CDRs of an antibody light chain variable domain described herein(e.g., an E3 light chain variable domain). In one embodiment, the lightchain coding sequence differs from SEQ ID NO:702 at at least 3, 5, 6, 8,9, 10, or 15 codons.

In one embodiment, for example, one or more of the ala-GCG codons can bechanged to GCC; one or more of the arg-CGT codons are changed to CGC;one or more of the pro-CCG codons are changed to CCC, CCT, or CCA; oneor more of the ser-TCG codons are changed to TCC; and/or one or more ofthe thr-ACG codons are changed to ACC.

Codon-altered (e.g., codon-optimized) sequences can be used to producean antibody. An exemplary method includes providing a mammalian cellthat includes an antibody-coding nucleic acid and expressing the nucleicacid in the cell, e.g., maintaining the cell under conditions in whichthe protein is expressed. The antibody-coding nucleic acid can beproviding in a mammalian expression vector, e.g., a vector that isintroduced into the cell. The cell can be a non-human mammalian cell,e.g., a CHO cell.

For antibodies that include an Fc domain, the antibody production systempreferably synthesizes antibodies in which the Fc region isglycosylated. For example, the Fc domain of IgG molecules isglycosylated at asparagine 297 in the CH2 domain. This asparagine is thesite for modification with biantennary-type oligosaccharides. It hasbeen demonstrated that this glycosylation is required for effectorfunctions mediated by Fey receptors and complement Clq (Burton and Woof(1992) Adv. Immunol. 51:1-84; Jefferis et al. (1998) Immunol. Rev.163:59-76). In a preferred embodiment, the Fc domain is produced in amammalian expression system that appropriately glycosylates the residuecorresponding to asparagine 297. The Fc domain can also include othereukaryotic post-translational modifications.

Antibodies can also be produced by a transgenic animal. For example,U.S. Pat. No. 5,849,992 describes a method of expressing an antibody inthe mammary gland of a transgenic mammal. A transgene is constructedthat includes a milk-specific promoter and nucleic acids encoding theantibody of interest and a signal sequence for secretion. The milkproduced by females of such transgenic mammals includes,secreted-therein, the antibody of interest. The antibody can be purifiedfrom the milk, or for some applications, used directly.

It is also possible to produce antibodies that bind to Tie1, Tie2, orAng by immunization, e.g., using an animal, e.g., with natural, human,or partially human immunoglobulin loci. Such an antibody can be of anyallotype, e.g., a,z allotype, f allotype, or non-A allotype. Non-humanantibodies can also be modified to include substitutions for humanimmunoglobulin sequences, e.g., consensus human amino acid residues atparticular positions, e.g., at one or more of the following positions(preferably at least five, ten, twelve, or all): (in the FR of thevariable domain of the light chain) 4L, 35L, 36L, 38L, 43L, 44L, 58L,46L, 62L, 63L, 64L, 65L, 66L, 67L, 68L, 69L, 70L, 71L, 73L, 85L, 87L,98L, and/or (in the FR of the variable domain of the heavy chain) 2H,4H, 24H, 36H, 37H, 39H, 43H, 45H, 49H, 58H, 60H, 67H, 68H, 69H, 70H,73H, 74H, 75H, 78H, 91H, 92H, 93H, and/or 103H (according to the Kabatnumbering). See, e.g., U.S. Pat. No. 6,407,213.

Tie1 production. Methods for producing Tie1 ectodomain protein, Tie1protein, or Tie1 liposomes are known in the art. See, e.g., WO 93/14124.Methods for producing Tie2 and Ang are similarly known. See e.g., U.S.Pat. Nos. 6,521,424, 6,376,653; WO 96/11269; WO 96/31598.

Biotinylation Methods. A variety of methods are available to biotinylateproteins, e.g., an immunoglobulin protein or a target protein. Forexample, the protein can be incubated with a 5-fold molar excess ofsulfo-NHS—SS-biotin in 50 mM HEPES, pH 8.0, 100 mM NaCl overnight at 4°C. Free biotin is removed by buffer exchange into PBS, 0.01% Tween 20,e.g., using a BIOMAX® device with a 10 kDa molecular weight cut-offmembrane or by dialysis. The number of biotin molecules incorporated permole of protein can be determined using the HABA assay as described bythe manufacturer (Pierce).

Pharmaceutical Compositions

In another aspect, the invention provides compositions, e.g.,pharmaceutically acceptable compositions, which include an agent thatbinds to Tie1, Tie2, or Ang, e.g., an antibody molecule, otherpolypeptide or peptide identified as binding to Tie1, Tie2, or Ang, ordescribed herein, formulated with a pharmaceutically acceptable carrier.Pharmaceutical compositions encompass labeled binding proteins (e.g.,for in vivo imaging) as well as therapeutic compositions.

As used herein, “pharmaceutically acceptable carrier” includes any andall solvents, dispersion media, coatings, antibacterial and antifungalagents, isotonic and absorption delaying agents, and the like that arephysiologically compatible. Preferably, the carrier is suitable forintravenous, intramuscular, subcutaneous, parenteral, spinal orepidermal administration (e.g., by injection or infusion). Depending onthe route of administration, the binding protein, may be coated in amaterial to protect the compound from the action of acids and othernatural conditions that may inactivate the compound.

A “pharmaceutically acceptable salt” refers to a salt that retains thedesired biological activity of the parent compound and does not impartany undesired toxicological effects (see e.g., Berge, S. M., et al.(1977) J. Pharm. Sci. 66:1-19). Examples of such salts include acidaddition salts and base addition salts. Acid addition salts includethose derived from nontoxic inorganic acids, such as hydrochloric,nitric, phosphoric, sulfuric, hydrobromic, hydroiodic, phosphorous andthe like, as well as from nontoxic organic acids such as aliphatic mono-and dicarboxylic acids, phenyl-substituted alkanoic acids, hydroxyalkanoic acids, aromatic acids, aliphatic and aromatic sulfonic acidsand the like. Base addition salts include those derived from alkalineearth metals, such as sodium, potassium, magnesium, calcium and thelike, as well as from nontoxic organic amines, such asN,N′-dibenzylethylenediamine, N-methylglucamine, chloroprocaine,choline, diethanolamine, ethylenediamine, procaine and the like.

Compositions may be in a variety of forms. These include, for example,liquid, semi-solid and solid dosage forms, such as liquid solutions(e.g., injectable and infusible solutions), dispersions or suspensions,tablets, pills, powders, liposomes and suppositories. The preferred formdepends on the intended mode of administration and therapeuticapplication. Typical preferred compositions are in the form ofinjectable or infusible solutions, such as compositions similar to thoseused for administration of humans with antibodies. The preferred mode ofadministration is parenteral (e.g., intravenous, subcutaneous,intraperitoneal, intramuscular). In a preferred embodiment, thetarget-binding protein is administered by intravenous infusion orinjection. In another preferred embodiment, the target-binding proteinis administered by intramuscular or subcutaneous injection.

The phrases “parenteral administration” and “administered parenterally”as used herein means modes of administration other than enteral andtopical administration, usually by injection, and includes, withoutlimitation, intravenous, intramuscular, intraarterial, intrathecal,intracapsular, intraorbital, intracardiac, intradermal, intraperitoneal,transtracheal, subcutaneous, subcuticular, intraarticular, subcapsular,subarachnoid, intraspinal, epidural and infrasternal injection andinfusion.

The composition can be formulated as a solution, microemulsion,dispersion, liposome, or other ordered structure suitable to high drugconcentration. Sterile injectable solutions can be prepared byincorporating the binding protein in the required amount in anappropriate solvent with one or a combination of ingredients enumeratedabove, as required, followed by filtered sterilization. Generally,dispersions are prepared by incorporating the active compound into asterile vehicle that contains a basic dispersion medium and the requiredother ingredients from those enumerated above. In the case of sterilepowders for the preparation of sterile injectable solutions, thepreferred methods of preparation are vacuum drying and freeze-dryingthat yields a powder of the active ingredient plus any additionaldesired ingredient from a previously sterile-filtered solution thereof.The proper fluidity of a solution can be maintained, for example, by theuse of a coating such as lecithin, by the maintenance of the requiredparticle size in the case of dispersion and by the use of surfactants.Prolonged absorption of injectable compositions can be brought about byincluding in the composition an agent that delays absorption, forexample, monostearate salts and gelatin.

The binding proteins described herein can be administered by a varietyof methods known in the art, although for many applications, thepreferred route/mode of administration is intravenous injection orinfusion. For example, for therapeutic applications, the target-bindingprotein can be administered by intravenous infusion, e.g., at a rate ofless than 30, 20, 10, 5, or 1 mg/min to reach a dose of about 1 to 100mg/m² or 7 to 25 mg/m². The route and/or mode of administration willvary depending upon the desired results. In certain embodiments, theactive compound may be prepared with a carrier that will protect thecompound against rapid release, such as a controlled releaseformulation, including implants, and microencapsulated delivery systems.Biodegradable, biocompatible polymers can be used, such as ethylenevinyl acetate, polyanhydrides, polyglycolic acid, collagen,polyorthoesters, and polylactic acid. Many methods for the preparationof such formulations are patented or generally known. See, e.g.,Sustained and Controlled Release Drug Delivery Systems, J. R. Robinson,ed., Marcel Dekker, Inc., New York, 1978.

In certain embodiments, the binding protein may be orally administered,for example, with an inert diluent or an assimilable edible carrier. Thecompound (and other ingredients, if desired) may also be enclosed in ahard or soft shell gelatin capsule, compressed into tablets, orincorporated directly into the subject's diet. For oral therapeuticadministration, the compounds may be incorporated with excipients andused in the form of ingestible tablets, buccal tablets, troches,capsules, elixirs, suspensions, syrups, wafers, and the like. Toadminister a compound described herein by other than parenteraladministration, it may be necessary to coat the compound with, orco-administer the compound with, a material to prevent its inactivation.

Pharmaceutical compositions can be administered with medical devicesknown in the art. For example, in a preferred embodiment, apharmaceutical can be administered with a needleless hypodermicinjection device, such as the devices disclosed in U.S. Pat. Nos.5,399,163, 5,383,851, 5,312,335, 5,064,413, 4,941,880, 4,790,824, or4,596,556. Examples of implants and modules include: U.S. Pat. No.4,487,603, which discloses an implantable micro-infusion pump fordispensing medication at a controlled rate; U.S. Pat. No. 4.,486,194,which discloses a therapeutic device for administering medicants throughthe skin; U.S. Pat. No. 4,447,233, which discloses a medication infusionpump for delivering medication at a precise infusion rate; U.S. Pat. No.4,447,224, which discloses a variable flow implantable infusionapparatus for continuous drug delivery; U.S. Pat. No. 4,439,196, whichdiscloses an osmotic drug delivery system having multi-chambercompartments; and U.S. Pat. No. 4,475,196, which discloses an osmoticdrug delivery system. Of course, many other such implants, deliverysystems, and modules are also known.

In certain embodiments, a binding protein described herein can beformulated to ensure proper distribution in vivo. For example, theblood-brain barrier (BBB) excludes many highly hydrophilic compounds. Toensure that the therapeutic protein crosses the BBB (if desired), it canbe formulated, for example, in liposomes. For methods of manufacturingliposomes, see, e.g., U.S. Pat. Nos. 4,522,811; 5,374,548; and5,399,331. The liposomes may include one or more moieties which areselectively transported into specific cells or organs, thus enhancetargeted drug delivery (see, e.g., V. V. Ranade (1989) J. Clin.Pharmacol. 29:685).

Dosage regimens are adjusted to provide the optimum desired response(e.g., a therapeutic response). For example, a single bolus may beadministered, several divided doses may be administered over time or thedose may be proportionally reduced or increased as indicated by theexigencies of the therapeutic situation. It is especially advantageousto formulate parenteral compositions in dosage unit form for ease ofadministration and uniformity of dosage. Dosage unit form as used hereinrefers to physically discrete units suited as unitary dosages for thesubjects to be treated; each unit contains a predetermined quantity ofactive compound calculated to produce the desired therapeutic effect inassociation with the required pharmaceutical carrier. The specificationfor the dosage unit forms can be dictated by and directly dependent on(a) the unique characteristics of the active compound and the particulartherapeutic effect to be achieved, and (b) the limitations inherent inthe art of compounding such an active compound for the treatment ofsensitivity in individuals.

An exemplary, non-limiting range for a therapeutically orprophylactically effective amount of an antibody described herein is0.1-20 mg/kg, more preferably 1-10 mg/kg. The target-binding antibodycan be administered by intravenous infusion at a rate of less than 30,20, 10, 5, or 1 mg/min to reach a dose of about 1 to 100 mg/m² or about5 to 30 mg/m². For binding proteins smaller in molecular weight than anantibody, appropriate amounts can be proportionally less. It is to benoted that dosage values may vary with the type and severity of thecondition to be alleviated. It is to be further understood that for anyparticular subject, specific dosage regimens should be adjusted overtime according to the individual need and the professional judgment ofthe person administering or supervising the administration of thecompositions, and that dosage ranges set forth herein are exemplary onlyand are not intended to limit the scope or practice of the claimedcomposition.

The pharmaceutical compositions may be prepared using a “therapeuticallyeffective amount” or a “prophylactically effective amount” of antarget-binding protein described herein. A “therapeutically effectiveamount” refers to an amount effective, at dosages and for periods oftime necessary, to achieve the desired therapeutic result. Atherapeutically effective amount of the composition may vary accordingto factors such as the disease state, age, sex, and weight of theindividual, and the ability of the binding protein to elicit a desiredresponse in the individual. A therapeutically effective amount is alsoone in which any toxic or detrimental effects of the composition areoutweighed by the therapeutically beneficial effects. A “therapeuticallyeffective dosage” preferably inhibits a measurable parameter, e.g.,inflammation or tumor growth rate by at least about 20%, more preferablyby at least about 40%, even more preferably by at least about 60%, andstill more preferably by at least about 80% relative to untreatedsubjects. The ability of a compound to inhibit a measurable parameter,e.g., cancer, can be evaluated in an animal model system predictive ofefficacy in human tumors. Alternatively, this property of a compositioncan be evaluated by examining the ability of the compound to inhibit,such inhibition in vitro by assays known to the skilled practitioner.

A “prophylactically effective amount” refers to an amount effective, atdosages and for periods of time necessary, to achieve the desiredprophylactic result. Typically, since a prophylactic dose is used insubjects prior to or at an earlier stage of disease, theprophylactically effective amount will be less than the therapeuticallyeffective amount.

Also within the scope of the invention are kits including the bindingprotein that binds to Tie1, Tie2, or Ang and instructions for use, e.g.,treatment, prophylactic, or diagnostic use. In one embodiment, theinstructions for diagnostic applications include the use of thetarget-binding protein (e.g., antibody or antigen-binding fragmentthereof, or other polypeptide or peptide) to detect Tie1, Tie2, or Ang,in vitro, e.g., in a sample, e.g., a biopsy or cells from a patienthaving an inflammatory disorder or a cancer or neoplastic disorder, orin vivo. In another embodiment, the instructions for therapeuticapplications include suggested dosages and/or modes of administration ina patient with a cancer or neoplastic disorder. The kit can furthercontain at least one additional reagent, such as a diagnostic ortherapeutic agent, e.g., a diagnostic or therapeutic agent as describedherein, and/or one or more additional target-binding proteins,formulated as appropriate, in one or more separate pharmaceuticalpreparations.

In one embodiment, target binding proteins (such as the Tie1 antibodiesdescribed herein) can be produced from gene-based vectors, such astransgenes or via adenoviral delivery.

Stabilization and Retention

In one embodiment, a target-binding agent (e.g., a Tie1 -bindingprotein, polypeptide, antibody, or aptamer described herein) isphysically associated with a moiety that improves its stabilizationand/or retention in circulation, e.g., in blood, serum, lymph, or othertissues.

For example, a target-binding agent can be associated with a polymer,e.g., a substantially non-antigenic polymers, such as polyalkyleneoxides or polyethylene oxides. Suitable polymers will vary substantiallyby weight. Exemplary polymers include polymers having molecular numberaverage weights ranging from about 200 to about 35,000, from about 1,000to about 15,000, and 2,000 to about 12,500.

For example, an target-binding agent can be conjugated to a watersoluble polymer, e.g., hydrophilic polyvinyl polymers, e.g.polyvinylalcohol and polyvinylpyrrolidone. A non-limiting list of suchpolymers include polyalkylene oxide homopolymers such as polyethyleneglycol (PEG) or polypropylene glycols, polyoxyethylenated polyols,copolymers thereof and block copolymers thereof, provided that the watersolubility of the block copolymers is maintained. Additional usefulpolymers include polyoxyalkylenes such as polyoxyethylene,polyoxypropylene, and block copolymers of polyoxyethylene andpolyoxypropylene (Pluronics); polymethacrylates; carbomers; branched orunbranched polysaccharides which comprise the saccharide monomersD-mannose, D- and L-galactose, fucose, fructose, D-xylose, L-arabinose,D-glucuronic acid, sialic acid, D-galacturonic acid, D-mannuronic acid(e.g. polymannuronic acid, or alginic acid), D-glucosamine,D-galactosamine, D-glucose and neuraminic acid includinghomopolysaccharides and heteropolysaccharides such as lactose,amylopectin, starch, hydroxyethyl starch, amylose, dextrane sulfate,dextran, dextrins, glycogen, or the polysaccharide subunit of acidmucopolysaccharides, e.g. hyaluronic acid; polymers of sugar alcoholssuch as polysorbitol and polymannitol; heparin or heparon.

Other compounds can also be attached to the same polymer, e.g., acytotoxin, a label, or another targeting agent, e.g., anothertarget-binding agent or an unrelated agent. Mono-activated,alkoxy-terminated polyalkylene oxides (PAO's), e.g.,monomethoxy-terminated polyethylene glycols (mPEG's); C₁₋₄alkyl-terminated polymers; and bis-activated polyethylene oxides(glycols) can be used for crosslinking. See, e.g., U.S. Pat. No.5,951,974.

In its most common form poly(ethylene glycol), PEG, is a linear orbranched polyether terminated with hydroxyl groups and having thegeneral structure:

HO—(CH₂CH₂O)_(n)—CH₂CH₂—OH

PEG can be synthesized by anionic ring opening polymerization ofethylene oxide initiated by nucleophilic attack of a hydroxide ion onthe epoxide ring. Particularly useful for polypeptide modification ismonomethoxy PEG, mPEG, having the general structure:

CH₃O—(CH₂CH₂O)—_(n)—CH₂CH₂—OH

For further description, see, e.g., Roberts et al. (2002) Advanced DrugDelivery Reviews 54:459-476.

In one embodiment, the polymer prior to cross-linking need not be, butpreferably is, water soluble. Generally, after crosslinking, the productis water soluble, e.g., exhibits a water solubility of at least about0.01 mg/ml, and more preferably at least about 0.1 mg/ml, and still morepreferably at least about 1 mg/ml. In addition, the polymer should notbe highly immunogenic in the conjugate form, nor should it possessviscosity that is incompatible with intravenous infusion or injection ifthe conjugate is intended to be administered by such routes.

In one embodiment, the polymer contains only a single group which isreactive. This helps to avoid cross-linking of protein molecules.However, it is within the scope herein to maximize reaction conditionsto reduce cross-linking, or to purify the reaction products through gelfiltration or ion exchange chromatography to recover substantiallyhomogenous derivatives. In other embodiments, the polymer contains twoor more reactive groups for the purpose of linking multiple agents tothe polymer backbone. Again, gel filtration or ion exchangechromatography can be used to recover the desired derivative insubstantially homogeneous form.

The molecular weight of the polymer can range up to about 500,000 D, andpreferably is at least about 20,000 D, or at least about 30,000 D, or atleast about 40,000 D. The molecular weight chosen can depend upon theeffective size of the conjugate to be achieved, the nature (e.g.structure, such as linear or branched) of the polymer, and the degree ofderivatization.

The covalent crosslink can be used to attach a target-binding agent(e.g., a protein) to a polymer, for example, crosslinking to theN-terminal amino group and epsilon amino groups found on lysineresidues, as well as other amino, imino, carboxyl, sulfhydryl, hydroxylor other hydrophilic groups. The polymer may be covalently bondeddirectly to the target-binding protein without the use of amultifunctional (ordinarily bifunctional) crosslinking agent. Covalentbinding to amino groups is accomplished by known chemistries based uponcyanuric chloride, carbonyl diimidazole, aldehyde reactive groups (PEGalkoxide plus diethyl acetal of bromoacetaldehyde; PEG plus DMSO andacetic anhydride, or PEG chloride plus the phenoxide of4-hydroxybenzaldehyde, activated succinimidyl esters, activateddithiocarbonate PEG, 2,4,5-trichlorophenylcloroformate orP-nitrophenylcloroformate activated PEG.) Carboxyl groups can bederivatized by coupling PEG-amine using carbodiimide. Sulfhydryl groupscan be derivatized by coupling to maleimido-substituted PEG (e.g.alkoxy-PEG amine plus sulfosuccinimidyl4-(N-maleimidomethyl)cyclohexane-1-carboxylate) WO 97/10847 orPEG-maleimide commercially available from Shearwater Polymers, Inc.,Huntsville, Ala.). Alternatively, free amino groups on the bindingprotein (e.g. epsilon amino groups on lysine residues) can be thiolatedwith 2-imino-thiolane (Traut's reagent) and then coupled tomaleimide-containing derivatives of PEG, e.g., as described in Pedley etal., Br. J. Cancer, 70: 1126-1130 (1994).

Functionalized PEG polymers that can be attached to a target-bindingagent (e.g., protein) are available, e.g., from Shearwater Polymers,Inc. (Huntsville, Ala.). Such commercially available PEG derivativesinclude, e.g., amino-PEG, PEG amino acid esters, PEG-hydrazide,PEG-thiol, PEG-succinate, carboxymethylated PEG, PEG-propionic acid, PEGamino acids, PEG succinimidyl succinate, PEG succinimidyl propionate,succinimidyl ester of carboxymethylated PEG, succinimidyl carbonate ofPEG, succinimidyl esters of amino acid PEGs, PEG-oxycarbonylimidazole,PEG-nitrophenyl carbonate, PEG tresylate, PEG-glycidyl ether,PEG-aldehyde, PEG vinylsulfone, PEG-maleimide,PEG-orthopyridyl-disulfide, heterofunctional PEGs, PEG vinylderivatives, PEG silanes, and PEG phospholides. The reaction conditionsfor coupling these PEG derivatives may vary depending on theTie1-binding protein, the desired degree of PEGylation, and the PEGderivative utilized. Some factors involved in the choice of PEGderivatives include: the desired point of attachment (such as lysine orcysteine R-groups), hydrolytic stability and reactivity of thederivatives, stability, toxicity and antigenicity of the linkage,suitability for analysis, etc. Specific instructions for the use of anyparticular derivative are available from the manufacturer.

The conjugates of an target-binding agent (e.g., a Tie1 binding protein)and a polymer can be separated from the unreacted starting materials,e.g., by gel filtration or ion exchange chromatography, e.g., HPLC.Heterologous species of the conjugates are purified from one another inthe same fashion. Resolution of different species (e.g., containing oneor two PEG residues) is also possible, e.g., due to the difference inthe ionic properties of unreacted amino acids. See, e.g., WO 96/34015.

A target binding protein can also be physically associated with aprotein that provides a stabilizing or retention function, e.g., analbumin, e.g., human serum albumin. US 20040171794 describes exemplarymethods for physically associating a protein with serum albumin. Forexemplary, human albumin sequences or fragments thereof, see EP 201 239,EP 322 094 WO 97/24445, WO95/23857 especially the mature form of humanalbumin as shown in SEQ ID NO:18 of US 20040171794 and WO 01/79480 oralbumin from other vertebrates or fragments thereof, or analogs orvariants of these molecules or fragments thereof. Other exemplary humanserum albumin proteins can include one or both of the following sets ofpoint mutations Leu-407 to Ala, Leu-408 to Val, Val-409 to Ala, andArg-410 to Ala; or Arg-410 to Ala, Lys-413 to Gln, and Lys-414 to Gln(see, e.g., International Publication No. WO95/23857, with reference toSEQ ID NO:18 of US 20040171794).

Aptamers

In one embodiment, the invention also features target protein-bindingagents such as aptamers. The term nucleic acid “aptamer,” as usedherein, refers to a nucleic acid molecule which has a conformation thatincludes an internal non-duplex nucleic acid structure of at least 5nucleotides. An aptamer can be a single-stranded nucleic acid moleculewhich has regions of self-complementarity. Exemplary aptamers includenucleic acid molecules that bind to a target molecule other than anucleic acid, e.g., to Tie1, Tie2, or Ang. Particular aptamers may alsomodulate formation of a Tie complex or have one or more properties of atarget binding agent described herein and can be used in place of atarget binding protein.

Aptamers can be screened in vitro since a selected aptamer can berecovered by standard nucleic acid amplification procedures. The methodcan be enhanced, e.g., in later rounds of selection, by splittingselected aptamers into pools and modifying each aptamer in the pool witha detectable label such as a fluorophore. Pools having aptamers thatfunctionally alter the properties of the label can be identified. Suchpools can be repeatedly split and reanalyzed to identify the individualaptamers with the desired properties (see, e.g., Jhaveri et al. NatureBiotechnol. 18:1293).

In addition, aptamers can be screened for activity in vivo. For example,shuffled nucleic acids can be cloned into an expression vector that isintroduced into cells. RNA aptamers resulting from the expressedshuffled nucleic acids can be screened for a biological activity. Cellshaving the activity can be isolated and the expression vector for theselected RNA aptamer recovered.

An important feature of therapeutic oligomers (e.g., aptamers) is thedesign of the backbone of the administered oligomer. In someembodiments, the backbone contains internucleoside linkages that arestable in vivo and is structured such that the oligomer is resistant toendogenous nucleases, such as nucleases that attack the phosphodiesterlinkage. At the same time, the oligomer retains its ability to hybridizeto the target DNA or RNA (Agarwal, K. L. et al. (1979) Nucleic AcidsRes. 6:3009; Agarwal, S. et al. (1988) Proc. Natl. Acad. Sci USA85:7079). Modified oligonucleotides can be constructed using alternateinternucleotide linkages. Several of these exemplary linkages aredescribed in Uhlmann, E. and Peyman, A. (1990) Chemical Reviews90:543-584. Among these are methylphosphonates (wherein one of thephosphorus-linked oxygens has been replaced by methyl);phosphorothioates (wherein sulphur replaces one of these oxygens) andvarious amidates (wherein NH₂ or an organic amine derivative, such asmorpholidates or piperazidates, replace an oxygen). These substitutionsconfer enhanced stability. WO 91/15500 teaches various oligonucleotideanalogs in which one or more of the internucleotide linkages arereplaced by a sulfur based linkage, typically sulfamate diesters, whichare isosteric and isoelectric with the phosphodiester. WO 89/12060similarly discloses linkages containing sulfides, sulfoxides, andsulfones. WO 86/05518 suggests a variant of stereoregular polymeric3′,5′linkages. U.S. Pat. No. 5,079,151 discloses a msDNA molecule ofbranched RNA linked to a single strand DNA via a 2′,5′ phosphodiesterlinkage. U.S. Pat. No. 5,264,562 describes modified linkages of theformula —Y′CX'₂Y′— wherein Y′ is independently O or S and wherein eachX′ is a stabilizing substituent and independently chosen.Morpholino-type internucleotide linkages are described in U.S. Pat. No.5,034,506 and in some cases give rise to an increased affinity of theoligomer for complementary target sequences. U.S. Pat. Nos. 5,264,5625,596,086 disclose modified oligonucleotides having modified nucleosidelinkages which are capable of strong hybridization to target RNA andDNA.

Treatments

Binding agents that bind to Tie1, Tie2, or Ang have therapeutic andprophylactic utilities. For example, these binding agents can beadministered to cells in culture, e.g. in vitro or ex vivo, or can beadministered to a subject, e.g., in vivo, to treat, prevent, and/ordiagnose a variety of disorders, such as endothelial cell disorders,blood vessel development disorders, wound healing, inflammatory diseasesand cancers, particularly metastatic cancers. The term “treat” or“treatment” refers to the application or administration of an agent,alone or in combination with one or more other agents (e.g., a secondagent) to a subject, e.g., a patient, e.g., a patient who has a disorder(e.g., a disorder as described herein), a symptom of a disorder or apredisposition for a disorder, e.g., to cure, heal, alleviate, relieve,alter, remedy, ameliorate, improve or affect the disorder, the symptomsof the disorder or the predisposition toward the disorder. Treating acell refers to a reduction in an activity of a cell, e.g., ability of anendothelial cell to form tubes or vessels. A reduction does notnecessarily require a total elimination of activity, but a reduction,e.g., a statistically significant reduction, in the activity or thenumber of the cell.

As used herein, an amount of a target binding agent effective to treat adisorder, or a “therapeutically effective amount” refers to an amount ofthe binding agent which is effective, upon single or multiple-doseadministration to a subject, in treating a cell, e.g., an endothelialcell (e.g., a Tie1-expressing endothelial cell) or cancer cell(particularly a metastatic cell thereof), or in prolonging curing,alleviating, relieving or improving a subject with a disorder asdescribed herein beyond that expected in the absence of such treatment.In some cases, a therapeutically effective amount can be ascertained byevaluating the ability of the binding agent to reduce tumor size of axenograft in a nude mouse model relative to an untreated control mouse.As used herein, “inhibiting the growth” of a tumor or other neoplasmrefers to slowing, interrupting, arresting or stopping its growth andmetastases and does not necessarily indicate a total elimination of theneoplastic growth.

As used herein, an amount of an target-binding agent effective toprevent a disorder, or a “a prophylactically effective amount” of thebinding agent refers to an amount of a target binding agent, e.g., aTie1-binding protein, e.g., a Tie1-binding antibody described herein,which is effective, upon single- or multiple-dose administration to thesubject, for preventing or delaying the occurrence of the onset orrecurrence of a disorder, e.g., an endothelial cell-related disorder, ablood vessel development disorder, an inflammatory disease or a cancer.

Subjects that can be treated include human and non-human animals. Forexample, the human can be a human patient having a disordercharacterized by abnormal cell proliferation or cell differentiation.The term “non-human animals” includes all vertebrates, e.g., non-mammals(such as chickens, amphibians, reptiles) and mammals, such as non-humanprimates, sheep, dog, cow, pig, etc.

A binding agent described herein can be used to reduce angiogenesis in asubject, e.g., to treat a cancer (e.g., a solid tumor) or anangiogenesis-associated disorder. The method includes administering thebinding to the subject, e.g., in an amount effective to modulateangiogenesis, a symptom of the disorder, or progression of the disorder.The agent (e.g., a Tie1-binding protein, e.g., an anti-Tie1 antibody,e.g., E3) may be administered multiple times (e.g., at least two, three,five, or ten times) before a therapeutically effective amount isattained.

The binding agent, e.g., a Tie1 binding protein, can be used to treat orprevent cancer. In one embodiment, reduction in Tie1 activity by aTie1-binding protein can reduce or prevent angiogenesis near and aroundthe tumor, thereby reducing or preventing tumor growth. In anotherembodiment, the neoplasia includes endothelial or hematopoietic cellsthat are proliferating abnormally. A Tie1-binding protein can be used tomodulate the cells of a cancer themselves, e.g., to kill or ablate aneoplastic cell that expresses Tie1. For example, the cell is ahematopoietic cell.

Examples of cancers that can be treated include, but are not limited to,solid tumors, soft tissue tumors, and metastatic lesions. Examples ofsolid tumors include malignancies, e.g., sarcomas, adenocarcinomas, andcarcinomas, of the various organ systems, such as those affecting lung,breast, lymphoid, gastrointestinal (e.g., colon), and genitourinarytract (e.g., renal, urothelial cells), pharynx, prostate, ovary as wellas adenocarcinomas which include malignancies such as most coloncancers, rectal cancer, renal-cell carcinoma, liver cancer, non-smallcell carcinoma of the lung, cancer of the small intestine and so forth.Metastatic lesions of the aforementioned cancers can also be treated orprevented using the Tie1 binding proteins and other agents describedherein.

Still further examples of solid tumors that can be treated include:fibrosarcoma, myxosarcoma, liposarcoma, chondrosarcoma, osteogenicsarcoma, chordoma, angiosarcoma, endotheliosarcoma, lymphangiosarcoma,lymphangioendotheliosarcoma, synovioma, mesothelioma, Ewing's tumor,leiomyosarcoma, rhabdomyosarcoma, gastrointestinal system carcinomas,colon carcinoma, pancreatic cancer, breast cancer, genitourinary systemcarcinomas, ovarian cancer, prostate cancer, squamous cell carcinoma,basal cell carcinoma, adenocarcinoma, sweat gland carcinoma, sebaceousgland carcinoma, papillary carcinoma, papillary adenocarcinomas,cystadenocarcinoma, medullary carcinoma, bronchogenic carcinoma, renalcell carcinoma, hepatoma, bile duct carcinoma, choriocarcinoma,seminoma, embryonal carcinoma, Wilms' tumor, cervical cancer, endocrinesystem carcinomas, testicular tumor, lung carcinoma, small cell lungcarcinoma, non-small cell lung carcinoma, bladder carcinoma, epithelialcarcinoma, glioma, astrocytoma, medulloblastoma, craniopharyngioma,ependymoma, pinealoma, hemangioblastoma, acoustic neuroma,oligodendroglioma, meningioma, melanoma, neuroblastoma, andretinoblastoma.

A Tie1-binding protein can also be used to inhibit the proliferation ofhyperplastic/neoplastic cells of hematopoietic origin, e.g., cellsarising from myeloid, lymphoid or erythroid lineages, or precursor cellsthereof, particularly such cells that express Tie1 For instance, thebinding proteins described herein can be used for the treatment ofvarious myeloid disorders including, but not limited to, acutepromyeloid leukemia (APML), acute myelogenous leukemia (AML) and chronicmyelogenous leukemia (CML) (reviewed in Vaickus, L. (1991) Crit Rev. inOncol./Hemotol. 11:267-97). Lymphoid malignancies which may be treatedinclude, but are not limited to acute lymphoblastic leukemia (ALL),which includes B-lineage ALL and T-lineage ALL, chronic lymphocyticleukemia (CLL), prolymphocytic leukemia (PLL), hairy cell leukemia (HLL)and Waldenstrom's macroglobulinemia (WM). Additional forms of malignantlymphomas include non-Hodgkin's lymphoma and variants thereof,peripheral T-cell lymphomas, adult T-cell leukemia/lymphoma (ATL),cutaneous T-cell lymphoma (CTCL), large granular lymphocytic leukemia(LGF) and Hodgkin's disease. As Tie1 has been shown to be upregulated inacute myelogenous leukemia and myelodysplastic syndrome (Verstovsek etal., 2001, Leuk, Lymphoma), B cell chronic lymphocytic leukemia (Aguayoet al, 2001. Leukemia Research 25(4):279-85.), binding proteins thatinteract with Tie1 can be used to detect, treat, or prevent thesediseases.

Accordingly, a subject having or at risk for a hematopoietic disorder,e.g., a hematopoietic cancer, can be treated by administering a Tie1binding protein, e.g. a Tie1 binding protein that increases Tie1homodimerization, or a binding protein that antagonizes Tie complexformation. For example, the Tie1 binding protein can be an anti-Tie1antibody, e.g., an antibody described herein. The administration of thebinding protein can include multiple administrations, e.g., to achieve atherapeutic concentration using more than one dose. For example, theadministrations can be about once a week, every second or third day,etc.

Methods of administering Tie1-binding proteins and other agents are alsodescribed in “Pharmaceutical Compositions”. Suitable dosages of themolecules used will depend on the age and weight of the subject and theparticular drug used. The binding proteins can be used as competitiveagents to inhibit, reduce an undesirable interaction, e.g., between anatural or pathological agent and the Tie1.

In one embodiment, the Tie1-binding proteins are used to inhibit (e.g.,inhibit at least one activity of, reduce proliferation, migration,growth or viability) of a cell, e.g., an endothelial cell in vivo. Thebinding proteins can be used by themselves or conjugated to an agent,e.g., a cytotoxic drug, cytotoxin enzyme, or radioisotope. This methodincludes: administering the binding protein alone or attached to acytotoxic drug, to a subject requiring such treatment.

Since the Tie1-binding proteins recognize Tie1-expressing endothelialcells and can bind to endothelial cells that are associated with (e.g.,in proximity of or intermingled with) cancer cells, e.g., cancerouslung, liver, colon, breast, ovarian, epidermal, laryngeal, and cartilagecells, and particularly metastatic cells thereof, Tie1-binding proteinscan be used to inhibit (e.g., inhibit at least one activity, reducegrowth and proliferation, or kill) any such cells and inhibitangiogenesis. Reducing endothelial cell activity near a cancer canindirectly inhibit (e.g., inhibit at least one activity, reduce growthand proliferation, or kill) the cancer cells which may be dependent onthe endothelial cells for nutrients, growth signals and so forth.

Alternatively, the binding proteins bind to cells in the vicinity of thecancerous cells, but are sufficiently close to the cancerous cells todirectly or indirectly inhibit (e.g., inhibit at least one activity,reduce growth and proliferation, or kill) the cancers cells. Thus, theTie1-binding proteins (e.g., modified with a toxin, e.g., a cytotoxin)can be used to selectively inhibit (e.g., kill or ablate cells incancerous tissue (including the cancerous cells themselves andendothelial cells associated with or invading the cancer).

The binding proteins may be used to deliver a variety of cytotoxic drugsincluding therapeutic drugs, a compound emitting radiation, molecules ofplants, fungal, or bacterial origin, biological proteins, and mixturesthereof. The cytotoxic drugs can be intracellularly acting cytotoxicdrugs, such as toxins short-range radiation emitters, e.g., short-range,high-energy α-emitters.

To kill or ablate normal, benign hyperplastic, or cancerous cells, afirst binding protein is conjugated with a prodrug which is activatedonly when in close proximity with a prodrug activator. The prodrugactivator is conjugated with a second binding protein, preferably onewhich binds to a non-competing site on the target molecule. Whether twobinding proteins bind to competing or non-competing binding sites can bedetermined by conventional competitive binding assays. Exemplarydrug-prodrug pairs are described in Blakely et al., (1996) CancerResearch, 56:3287-3292.

The Tie1-binding proteins can be used directly in vivo to eliminateantigen-expressing cells via natural complement-dependent cytotoxicity(CDC) or antibody-dependent cellular cytotoxicity (ADCC). The bindingproteins described herein can include complement binding effectordomain, such as the Fc portions from IgG1, -2, or -3 or correspondingportions of IgM which bind complement. In one embodiment, a populationof target cells is ex vivo treated with a binding agent described hereinand appropriate effector cells. The treatment can be supplemented by theaddition of complement or serum containing complement. Further,phagocytosis of target cells coated with a binding protein describedherein can be improved by binding of complement proteins. In anotherembodiment target, cells coated with the binding protein which includesa complement binding effector domain are lysed by complement.

Use of the therapeutic methods described herein to treat cancers has anumber of benefits. Tie1 expression may be induced in response tohypoxic signals that can arise within the interior of a tumor tostimulate changes in vasculature, including blood and lymphatic vesselsso as to increase nutrient and oxygen supply to the tumor. CertainTie1-binding antibodies (e.g., E3 and related antibodies) may beparticularly effective because they can inhibit changes to tumorvasculature and may cause a decrease in intra-tumor pressure. Theseagents may also be well suited as therapeutics in situations in whichconventional agents have difficulty in penetrating into a tumor.Furthermore, Tie1 binding proteins may leave hematopoiesis unaffected.Treatment can be effectively monitored with clinical parameters.Alternatively, these parameters can be used to indicate when suchtreatment should be employed.

A Tie1 binding protein, e.g. a Tie1 binding protein that increases Tie1homodimerization, or a binding protein that antagonizes Tie complexformation can be administered to a subject to treat or prevent aninflammatory disorder, e.g., psoriasis or rheumatoid arthritis.

Psoriasis. Psoriasis is a chronic skin disease, characterized by scalingand inflammation. When psoriasis develops, typically patches of skinthicken, redden, and become covered with silvery scales, referred to asplaques. Psoriasis most often occurs on the elbows, knees, scalp, lowerback, face, palms, and soles of the feet. The disease also may affectthe fingernails, toenails, and the soft tissues inside the mouth andgenitalia. About 10 percent of people with psoriasis have jointinflammation that produces symptoms of arthritis. Patients can beevaluated using a static Physician Global Assessment (sPGA), and receivea category score ranging from six categories between clear and verysevere. The score is based on plaque, scaling, and erythema. Thetherapeutic methods herein can be used to achieve an improvement for atleast one of these indicia.

Rheumatoid arthritis (“RA”) is a chronic inflammatory disease thatcauses pain, swelling, stiffness, and loss of function, primarily thejoints. RA frequently begins in the synovium, the membrane thatsurrounds a joint creating a protective sac. In many individualssuffering from RA, leukocytes infiltrate from the circulation into thesynovium causing continuous abnormal inflammation (e.g., synovitis).Consequently, the synovium becomes inflamed, causing warmth, redness,swelling, and pain. The collagen in the cartilage is graduallydestroyed, narrowing the joint space and eventually damaging bone. Theinflammation causes erosive bone damage in the affected area. Duringthis process, the cells of the synovium grow and divide abnormally,making the normally thin synovium thick and resulting in a joint that isswollen and puffy to the touch. RA can be assessed by a variety ofclinical measures. Some exemplary indicia include the total Sharp score(TSS), Sharp erosion score, and the HAQ disability index. Thetherapeutic methods herein can be used to achieve an improvement for atleast one of these indicia.

A Tie1 binding protein (e.g. a Tie1 binding protein that increases Tie1homodimerization) or a binding protein that antagonizes Tie complexformation can be administered to a subject to treat or prevent a retinaldisorder, e.g., a proliferative retinopathy, such as diabeticretinopathy, ischemic retinopathy, or retinopathy of prematurity;choroidal neovascularization; lens neovasculation; cornealneovascularization; iridial neovascularization; or conjunctivalneovascularization. The binding protein can be used to reduce the riskof retinal detachment associated with pathological ocularneovascularization. In some cases, the binding protein is administeredby subconjunctival administration.

Combination Therapies

Binding proteins described herein can be administered in combinationwith one or more of the other therapies for treating cancers, including,but not limited to: surgery; radiation therapy, and chemotherapy. Forexample, proteins that antagonize Tie complex formation or that modulateTie signalling activity (including, e.g., proteins that promote Tie1homodimerization and/or phosphorylation) can also be used in combinationwith other anti-cancer therapies, such as radiation therapy,chemotherapy, surgery, or administration of a second agent. For example,the second agent can be one that targets or negatively regulates theVEGF signaling pathway. Examples of this latter class include VEGFantagonists (e.g., anti-VEGF antibodies such as bevacizumab) and VEGFreceptor antagonists (e.g., anti-VEGF receptor antibodies). Oneparticularly combination includes bevacizumab. The combination canfurther include 5-FU and leucovorin, and/or irinotecan.

The term “combination” refers to the use of the two or more agents ortherapies to treat the same patient, wherein the use or action of theagents or therapies overlap in time. The agents or therapies can beadministered at the same time (e.g., as a single formulation that isadministered to a patient or as two separate formulations administeredconcurrently) or sequentially in any order. Sequential administrationsare administrations that are given at different times. The time betweenadministration of the one agent and another agent can be minutes, hours,days, or weeks. The use of a Tie1 binding protein described herein canalso be used to reduce the dosage of another therapy, e.g., to reducethe side-effects associated with another agent that is beingadministered, e.g., to reduce the side-effects of an anti-VEGF antibodysuch as bevacizumab. Accordingly, a combination can includeadministering a second agent at a dosage at least 10, 20, 30, or 50%lower than would be used in the absence of the Tie1 binding protein.

In addition, a subject can be treated for an angiogenesis-associateddisorder by administering to the subject a first and second agent. Forexample, the first agent modulates early stage angiogenesis and thesecond agent modulates a subsequent stage of angiogenesis or alsomodulates early stage angiogenesis. The first and second agents can beadministered using a single pharmaceutical composition or can beadministered separately. In one embodiment, the first agent is a VEGFpathway antagonist (e.g., an inhibitor of a VEGF (e.g., VEGF-A, -B, or-C) or a VEGF receptor (e.g., KDR or VEGF receptor III (Flt4)) or a bFGFpathway antagonist (e.g., an antibody that binds to bFGF or a bFGFreceptor). Other VEGF pathway antagonists are also described, herein andelsewhere. In one embodiment, the second agent inhibits or decreasesassembly and stabilization of the blood vessels, disrupts maintenance ofblood or lymphatic vessels, or alters distribution of lymphatic vesselsin tumors. For example, the second agent comprises inhibits a Tiecomplex formation or promotes Tie1 homodimerization. For example, thesecond agent is a Tie1 binding protein described herein.

Once a tumor reaches a certain size (e.g., ˜1-2 mm), the tumor requiresnew vasculature prior to increasing its mass. An early stage of tumorangiogenesis can include a signal from the tumor, e.g., secretion ofVEGF, to stimulate the growth of new blood vessels from the host andinfiltration of the tumor by the vessels. VEGF can, for example,stimulate proliferation of endothelial cells that are then assembledinto blood vessels. A late stage of tumor angiogenesis can include asignal that leads to the assembly and stabilization of the bloodvessels. This assembly and stabilization may involve interaction betweenthe endothelial cells and the pericytes that surround the endothelialcells of the vessels. Tie1, for example, may play a role in the assemblyand stabilization of the vessels and in maintaining the associationbetween the pericytes and endothelial cells. Thus, an effective therapyto treat angiogenesis-related disorders can involve a combination of anagent that modulates an early stage angiogenesis (e.g., VEGF pathwayantagonists, e.g., anti-VEGF (e.g., bevacizumab) or anti-VEGF receptor(e.g., anti-KDR) antibodies; or antagonists of other pro-angiogenicpathways, e.g., anti-bFGF antibodies or anti-bFGF receptor (e.g.,anti-bFGF receptor-1, -2, -3) antibodies) and an agent that modulates alate stage of tumor angiogenesis (e.g., antagonists of Tie1 (e.g.,anti-Tie1 antibodies (e.g., an antibody disclosed herein, e.g., an E3antibody)), of Tie2 (e.g., anti-Tie2 antibodies), or of Angs (e.g.,anti-Ang antibodies (e.g., anti-Ang2 antibodies) or anti-Ang2 peptides(e.g., inhibitory Ang2 peptides)). One or more of these agents can beused in combination. One or more of these agents may also be used incombination with other anti-cancer therapies, such as radiation therapyor chemotherapy.

Exemplary VEGF receptor antagonists include inhibitors of VEGF receptortyrosine kinase activity.4-[4-(1-Amino-1-methylethyl)phenyl]-2-[4-(2-morpholin-4-yl-ethyl)phenylamino]pyrimidine-5-carbonitrile(JNJ-17029259) is one of a structural class of 5-cyanopyrimidines thatare orally available, selective, nanomolar inhibitors of the vascularendothelial growth factor receptor-2 (VEGF-R2). Additional examplesinclude: PTK-787/ZK222584(Astra-Zeneca), SU5416, SU11248 (Pfizer), andZD6474([N-(4-bromo-2-fluorophenyl)-6-methoxy-7-[(1-methylpiperidin-4-yl)methoxy]quinazolin-4-amine]).Still other agents that can be used in combination with Tie1-bindingproteins are broad specificity tyrosine kinase inhibitors, e.g., SU6668.See, e.g., Bergers, B. et al. (2003) J. Clin. Invest. 111, 1287-1295.

The second agent or therapy can also be another anti-cancer agent ortherapy. Nonlimiting examples of anti-cancer agents include, e.g.,anti-microtubule agents, topoisomerase inhibitors, antimetabolites,mitotic inhibitors, alkylating agents, intercalating agents, agentscapable of interfering with a signal transduction pathway, agents thatpromote apoptosis, radiation, and antibodies against othertumor-associated antigens (including naked antibodies, immunotoxins andradioconjugates). Examples of the particular classes of anti-canceragents are provided in detail as follows: antitubulin/antimicrotubule,e.g., paclitaxel, vincristine, vinblastine, vindesine, vinorelbin,taxotere; topoisomerase I inhibitors, e.g., irinotecan, topotecan,camptothecin, doxorubicin, etoposide, mitoxantrone, daunorubicin,idarubicin, teniposide, amsacrine, epirubicin, merbarone, piroxantronehydrochloride; antimetabolites, e.g., 5-fluorouracil (5-FU),methotrexate, 6-mercaptopurine, 6-thioguanine, fludarabine phosphate,cytarabine/Ara-C, trimetrexate, gemcitabine, acivicin, alanosine,pyrazofurin, N-Phosphoracetyl-L-Asparate=PALA, pentostatin,5-azacitidine, 5-Aza 2′-deoxycytidine, ara-A, cladribine,5-fluorouridine, FUDR, tiazofurin,N-[5-[N-(3,4-dihydro-2-methyl-4-oxoquinazolin-6-ylmethyl)-N-methylamino]-2-thenoyl]-L-glutamicacid; alkylating agents, e.g., cisplatin, carboplatin, mitomycin C,BCNU=Carmustine, melphalan, thiotepa, busulfan, chlorambucil,plicamycin, dacarbazine, ifosfamide phosphate, cyclophosphamide,nitrogen mustard, uracil mustard, pipobroman, 4-ipomeanol; agents actingvia other mechanisms of action, e.g., dihydrolenperone, spiromustine,and desipeptide; biological response modifiers, e.g., to enhanceanti-tumor responses, such as interferon; apoptotic agents, such asactinomycin D; and anti-hormones, for example anti-estrogens such astamoxifen or, for example antiandrogens such as4′-cyano-3-(4-fluorophenylsulphonyl)-2-hydroxy-2-methyl-3′-(trifluoromethyl)propionanilide.

A combination therapy can include administering an agent that reducesthe side effects of other therapies. The agent can be an agent thatreduces the side effects of anti-cancer treatments. For example, theagent can be leucovorin.

Combination therapies that include administering a Tie1 binding proteinor other binding protein described herein can also be used to treat asubject having or at risk for another angiogenesis related disorder(e.g., a disorder other than cancer, e.g., disorders that includeundesired endothelial cell proliferation or undesirable inflammation,e.g., rheumatoid arthritis.

Diagnostic Uses

Binding proteins that bind to Tie1 (e.g., antibodies, e.g., an antibodydescribed herein) have in vitro and in vivo diagnostic, therapeutic andprophylactic utilities.

In one aspect, the invention provides a diagnostic method for detectingthe presence of a Tie1, in vitro (e.g., a biological sample, such astissue, biopsy, e.g., a cancerous tissue) or in vivo (e.g., in vivoimaging in a subject). The method includes: (i) contacting a sample withTie1-binding protein; and (ii) detecting formation of a complex betweenthe Tie1-binding protein and the sample. The method can also includecontacting a reference sample (e.g., a control sample) with the bindingprotein, and determining the extent of formation of the complex betweenthe binding protein and the sample relative to the same for thereference sample. A change, e.g., a statistically significant change, inthe formation of the complex in the sample or subject relative to thecontrol sample or subject can be indicative of the presence of Tie1 inthe sample. The Tie1-binding protein can be directly or indirectlylabeled with a detectable substance to facilitate detection of the boundor unbound antibody. Suitable detectable substances include variousenzymes, prosthetic groups, fluorescent materials, luminescent materialsand radioactive materials.

Complex formation between the Tie1-binding protein and Tie1 can bedetected by measuring or visualizing either the binding protein bound tothe Tie1 or unbound binding protein. Conventional detection assays canbe used, e.g., an enzyme-linked immunosorbent assays (ELISA), aradioimmunoassay (RIA) or tissue immunohistochemistry. Further tolabeling the Tie1-binding protein, the presence of Tie1 can be assayedin a sample by a competition immunoassay utilizing standards labeledwith a detectable substance and an unlabeled Tie1-binding protein. Inone example of this assay, the biological sample, the labeled standardsand the Tie1 binding agent are combined and the amount of labeledstandard bound to the unlabeled binding protein is determined. Theamount of Tie1 in the sample is inversely proportional to the amount oflabeled standard bound to the Tie1 binding agent.

Fluorophore and chromophore labeled binding proteins can be prepared.Since antibodies and other proteins absorb light having wavelengths upto about 310 nm, the fluorescent moieties should be selected to havesubstantial absorption at wavelengths above 310 nm and preferably above400 nm. A variety of suitable fluorescers and chromophores are describedby Stryer (1968) Science, 162:526 and Brand, L. et al. (1972) AnnualReview of Biochemistry, 41:843-868. The binding proteins can be labeledwith fluorescent chromophore groups by conventional procedures such asthose disclosed in U.S. Pat. Nos. 3,940,475, 4,289,747, and 4,376,110.One group of fluorescers having a number of the desirable propertiesdescribed above is the xanthene dyes, which include the fluoresceins andrhodamines. Another group of fluorescent compounds are thenaphthylamines. Once labeled with a fluorophore or chromophore, thebinding protein can be used to detect the presence or localization ofthe Tie1 in a sample, e.g., using fluorescent microscopy (such asconfocal or deconvolution microscopy).

Histological Analysis. Immunohistochemistry can be performed using thebinding proteins described herein. For example, in the case of anantibody, the antibody can synthesized with a label (such as apurification or epitope tag), or can be detectably labeled, e.g., byconjugating a label or label-binding group. For example, a chelator canbe attached to the antibody. The antibody is then contacted to ahistological preparation, e.g., a fixed section of tissue that is on amicroscope slide. After an incubation for binding, the preparation iswashed to remove unbound antibody. The preparation is then analyzed,e.g., using microscopy, to identify if the antibody bound to thepreparation. The method can be used to evaluate an endothelial cell ortissue formed by endothelial cells, e.g., blood vessels. The antibody(or other polypeptide or peptide) can be unlabeled at the time ofbinding. After binding and washing, the antibody is labeled in order torender it detectable.

Protein Arrays. The Tie1-binding protein can also be immobilized on aprotein array. The protein array can be used as a diagnostic tool, e.g.,to screen medical samples (such as isolated cells, blood, sera,biopsies, and the like). Of course, the protein array can also includeother binding proteins, e.g., that bind to Tie1 or to other targetmolecules, such as hyaluronic acid.

Methods of producing polypeptide arrays are described, e.g., in De Wildtet al. (2000) Nat. Biotechnol. 18:989-994; Lueking et al. (1999) Anal.Biochem. 270:103-111; Ge (2000) Nucleic Acids Res. 28, e3, I-VII;MacBeath and Schreiber (2000) Science 289:1760-1763; WO 01/40803 and WO99/51773A1. Polypeptides for the array can be spotted at high speed,e.g., using commercially available robotic apparati. The array substratecan be, for example, nitrocellulose, plastic, glass, e.g.,surface-modified glass. The array can also include a porous matrix,e.g., acrylamide, agarose, or another polymer.

For example, the array can be an array of antibodies, e.g., as describedin De Wildt, supra. Cells that produce the binding proteins can be grownon a filter in an arrayed format. Polypeptide production is induced, andthe expressed polypeptides are immobilized to the filter at the locationof the cell. A protein array can be contacted with a labeled target todetermine the extent of binding of the target to each immobilizedpolypeptide. If the target is unlabeled, a sandwich method can be used,e.g., using a labeled probed, to detect binding of the unlabeled target.Information about the extent of binding at each address of the array canbe stored as a profile, e.g., in a computer database. The protein arraycan be produced in replicates and used to compare binding profiles,e.g., of a target and a non-target.

FACS. (Fluorescent Activated Cell Sorting). The target-binding proteincan be used to label cells, e.g., cells in a sample (e.g., a patientsample). The binding protein can also be attached (or attachable) to afluorescent compound. The cells can then be sorted using fluorescentactivated cell sorted (e.g., using a sorter available from BectonDickinson Immunocytometry Systems, San Jose Calif.; see also U.S. Pat.No. 5,627,037; 5,030,002; and 5,137,809). As cells pass through thesorter, a laser beam excites the fluorescent compound while a detectorcounts cells that pass through and determines whether a fluorescentcompound is attached to the cell by detecting fluorescence. The amountof label bound to each cell can be quantified and analyzed tocharacterize the sample.

The sorter can also deflect the cell and separate cells bound by thebinding protein from those cells not bound. The separated cells can becultured and/or characterized.

In Vivo Imaging. In still another embodiment, the invention provides amethod for detecting the presence of a Tie1-expressing cancerous tissuesin vivo. The method includes: administering the Tie1-binding protein toa subject; and detecting the Tie1-binding protein in the subject. Thedetecting can include determining location or time of formation of thecomplex. The method can include scanning or otherwise imaging thesubject, e.g., a region of the subject's body. Another method includes(i) administering to a subject (e.g., a patient having a cancer orneoplastic disorder) a Tie1-binding antibody, conjugated to a detectablemarker; (ii) exposing the subject to a means for detecting saiddetectable marker to the Tie1-expressing tissues or cells. For example,the method can be used visualize blood vessels or the location ofendothelial cells, e.g., Tie1-expressing endothelial cells. The subjectcan be imaged, e.g., by NMR or other tomographic means.

Examples of labels useful for diagnostic imaging include radiolabelssuch as ¹³¹I, ¹¹¹In, ¹²³I, ^(99m)Tc, ³²P, ¹²⁵I, ³H, ¹⁴ _(C, and) ¹⁸⁸Rh,fluorescent labels such as fluorescein and rhodamine, nuclear magneticresonance active labels, positron emitting isotopes detectable by apositron emission tomography (“PET”) scanner, chemiluminescers such asluciferin, and enzymatic markers such as peroxidase or phosphatase.Short-range radiation emitters, such as isotopes detectable byshort-range detector probes can also be employed. The binding proteincan be labeled with such reagents using known techniques. For example,see Wensel and Meares (1983) Radioimmunoimaging and Radioimmunotherapy,Elsevier, N.Y. for techniques relating to the radiolabeling ofantibodies and D. Colcher et al. (1986) Meth. Enzymol. 121: 802-816.

A radiolabeled binding protein can also be used for in vitro diagnostictests. The specific activity of an isotopically-labeled protein dependsupon the half-life, the isotopic purity of the radioactive label, andhow the label is incorporated into the protein.

Effective imaging agents for tumor-associated neo-vasculature areneeded. Tie1 is up regulated on tumor-associated vasculature. Thebinding proteins described herein can be used to image such vasculature.

The binding proteins described herein can be used for imaging in severalways. A binding protein can be physically associated, e.g., coupled to achelator for imaging agents such as ^(99m)Tc, ¹⁸⁶Re, or ¹⁸⁸Re. ^(99m)Tcand ¹⁸⁸Re emit gamma rays suitable for single photon emission computertomography (SPECT) imaging. Radioactive fluorine (¹⁸F), indium (¹¹¹In),iodine (¹²³I, ¹³¹I), gallium (⁶⁸Ga, ⁶⁷Ga), carbon (¹¹C), thallium(²⁰¹Tl), and other elements may be used as imaging agents.

The binding proteins can also be attached, covalently or non-covalently,to a particle, e.g., a nano-particle, that includes a radionuclide orspin labels suitable for use as an imaging agent. The binding proteinscan be linked to a spin label that would allow imaging through MRI.Botnar et al. (Circulation. (2004) 109:2023-2029.) describe MRI imagingusing an exemplary gadolinium-labeled peptide. The binding proteinsdescribed herein can be similarly labeled for imaging.

Chen et al. (J. Nucl. Med., (2004) 45:1776-1783) showed that coupling asmall PEG molecule (average molecular weight 3.4 KDa) improved thatpharmacodynamics of an α_(v)β₃-binding peptide. Binding proteins (e.g.,Tie1, Tie2, or Ang binding proteins) can be coupled to PEG molecules toadjust the clearance rate and pathway.

Positron Emission Tomography (PET) can be used with imaging agents suchas positron emitters such as ⁶⁴Cu and ¹⁸F. These isotopes are becomingmore readily available. ⁶⁴Cu can be captured in the chelator DOTA. DOTAderivatives can be covalently linked to proteins. In one embodiment, oneor more DOTA derivatives are attached to a binding protein (e.g., a Fab)through a lysine side group.

Fabs are useful binding agents for imaging because they: a) clear fromthe system fairly raipdly, allowing imaging within a few hours ofinjection, and b) penetrate tumors efficiently.

Fabs that bind to Tie1, Tie2, or Ang can be produced, e.g., in E. colior in eukaryotic cells. The Fabs can be purified by chromatography overprotein A. Ion exchange chromatography can also be used. For use inimaging, covalent attachment of a chelating group suitable to thedesired radionuclide or other imaging agent allows the Fab to be labeledat the time of use. The Fabs can also have spin labels attached to allowMRI imaging. Fabs can also be attached to particles (e.g.,nano-particles) that include a radionuclide or spin label suitable forimaging. In particular embodiments, Fabs may be coupled to PEG moleculesto adjust the rate and pathway of clearance. In other embodiments, theFabs are not coupled to PEG, e.g., to maintain their rapid clearanceproperties.

Procedures for labeling polypeptides with the radioactive isotopes (suchas ¹⁴C, ³H, ³⁵S, ¹²⁵I, ³²P, ¹³¹I) are generally known. For example,tritium labeling procedures are described in U.S. Pat. No. 4,302,438.Iodinating, tritium labeling, and ³⁵S labeling procedures, e.g., asadapted for murine monoclonal antibodies, are described, e.g., byGoding, J. W. (Monoclonal antibodies: principles and practice:production and application of monoclonal antibodies in cell biology,biochemistry, and immunology 2nd ed. London; Orlando: Academic Press,1986. pp 124-126) and the references cited therein. Other procedures foriodinating polypeptides, such as antibodies, are described by Hunter andGreenwood (1962) Nature 144:945, David et al. (1974) Biochemistry13:1014-1021, and U.S. Pat. Nos. 3,867,517 and 4,376,110. Radiolabelingelements which are useful in imaging include ¹²³I, ¹³¹I, ¹¹¹In, and^(99m)Tc, for example. Procedures for iodinating antibodies aredescribed by Greenwood, F. et al. (1963) Biochem. J. 89:114-123;Marchalonis, J. (1969) Biochem. J. 113:299-305; and Morrison, M. et al.(1971) Immunochemistry 289-297. Procedures for ^(99m)Tc-labeling aredescribed by Rhodes, B. et al. in Burchiel, S. et al. (eds.), TumorImaging: The Radioimmunochemical Detection of Cancer, New York: Masson111-123 (1982) and the references cited therein. Procedures suitable for¹¹¹In-labeling antibodies are described by Hnatowich, D. J. et al.(1983) J. Immul. Methods, 65:147-157, Hnatowich, D. et al. (1984) J.Applied Radiation, 35:554-557, and Buckley, R. G. et al. (1984) F.E.B.S.166:202-204.

In the case of a radiolabeled binding protein, the binding protein isadministered to the patient, is localized to the tumor bearing theantigen with which the binding protein reacts, and is detected or“imaged” in vivo using known techniques such as radionuclear scanningusing e.g., a gamma camera or emission tomography. See e.g., A. R.Bradwell et al., “Developments in Antibody Imaging”, MonoclonalAntibodies for Cancer Detection and Therapy, R. W. Baldwin et al.,(eds.), pp 65-85 (Academic Press 1985). Alternatively, a positronemission transaxial tomography scanner, such as designated Pet VIlocated at Brookhaven National Laboratory, can be used where theradiolabel emits positrons (e.g., ¹¹C, ¹⁸F, ¹⁵O, and ¹³N).

MRI Contrast Agents. Magnetic Resonance Imaging (MRI) uses NMR tovisualize internal features of living subject, and is useful forprognosis, diagnosis, treatment, and surgery. MRI can be used withoutradioactive tracer compounds for obvious benefit. Some MRI techniquesare summarized in EP-A-0 502 814. Generally, the differences related torelaxation time constants T1 and T2 of water protons in differentenvironments are used to generate an image. However, these differencescan be insufficient to provide sharp high resolution images.

The differences in these relaxation time constants can be enhanced bycontrast agents. Examples of such contrast agents include a number ofmagnetic agents paramagnetic agents (which primarily alter T1) andferromagnetic or superparamagnetic (which primarily alter T2 response).Chelates (e.g., EDTA, DTPA and NTA chelates) can be used to attach (andreduce toxicity) of some paramagnetic substances (e.g., Fe⁺³, Mn⁺²,Gd⁺³). Other agents can be in the form of particles, e.g., less than 10μm to about 10 nM in diameter). Particles can have ferromagnetic,antiferromagnetic or superparamagnetic properties. Particles caninclude, e.g., magnetite (Fe₃O₄), γ-Fe₂O₃, ferrites, and other magneticmineral compounds of transition elements. Magnetic particles mayinclude: one or more magnetic crystals with and without nonmagneticmaterial. The nonmagnetic material can include synthetic or naturalpolymers (such as sepharose, dextran, dextrin, starch and the like

The target-binding proteins can also be labeled with an indicating groupcontaining of the NMR-active ¹⁹F atom, or a plurality of such atomsinasmuch as (i) substantially all of naturally abundant fluorine atomsare the ¹⁹F isotope and, thus, substantially all fluorine-containingcompounds are NMR-active; (ii) many chemically active polyfluorinatedcompounds such as trifluoracetic anhydride are commercially available atrelatively low cost, and (iii) many fluorinated compounds have beenfound medically acceptable for use in humans such as the perfluorinatedpolyethers utilized to carry oxygen as hemoglobin replacements. Afterpermitting such time for incubation, a whole body MRI is carried outusing an apparatus such as one of those described by Pykett (1982)Scientific American, 246:78-88 to locate and image cancerous tissues.

Information obtained from evaluating an target-binding protein, e.g., abinding protein described herein, can be recorded on machine-compatiblemedia, e.g., computer readable or computer accessible media. Theinformation can be stored as a computer representation, e.g., in adatabase (e.g., in the case of imaging using a binding protein, adatabase of images for one or a plurality of subjects). The term“computer representation” refers to information which is in a form thatcan be manipulated by a computer. The act of storing a computerrepresentation refers to the act of placing the information in a formsuitable for manipulation by a computer.

Also within the scope of the invention are kits including the bindingprotein that binds to Tie1 and instructions for diagnostic use, e.g.,the use of the target-binding protein (e.g., antibody or antigen-bindingfragment thereof, or other polypeptide or peptide) to detect Tie1, invitro, e.g., in a sample, e.g., a biopsy or cells from a patient havinga cancer or neoplastic disorder, or in vivo, e.g., by imaging a subject.The kit can further contain a least one additional reagent, such as alabel or additional diagnostic agent. For in vivo use the bindingprotein can be formulated as a pharmaceutical composition.

The following examples are not to be construed as limiting.

EXAMPLES Example 1 Tie1 Sequences

An exemplary Tie1 amino acid sequence (SEQ ID NO:2) is as follows:

MVWRVPPFLLPILFLASHVGAAVDLTLLANLRLTDPQRFFLTCVSGEAGAGRGSDAWGPPLLLEKDDRIVRTPPGPPLRLARNGSHQVTLRGFSKPSDLVGVFSCVGGAGARRTRVIYVHNSPGAHLLPDKVTHTVNKGDTAVLSARVHKEKQTDVIWKSNGSYFYTLDWHEAQDGRFLLQLPNVQPPSSGIYSATYLEASPLGSAFFRLIVRGCGAGRWGPGCTKECPGCLHGGVCHDHDGECVCPPGFTGTRCEQACREGRFGQSCQEQCPGISGCRGLTFCLPDPYGCSCGSGWRGSQCQEACAPGHFGADCRLQCQCQNGGTCDRFSGCVCPSGWHGVHCEKSDRIPQILNMASELEFNLETMPRINCAAAGNPFPVRGSIELRKPDGTVLLSTKAIVEPEKTTAEFEVPRLVLADSGFWECRVSTSGGQDSRRFKVNVKVPPVPLAAPRLLTKQSRQLVVSPLVSFSGDGPISTVRLHYRPQDSTMDWSTIVVDPSENVTLMNLRPKTGYSVRVQLSRPGEGGEGAWGPPTLMTTDCPEPLLQPWLEGWHVEGTDRLRVSWSLPLVPGPLVGDGFLLRLWDGTRGQERRENVSSPQARTALLTGLTPGTHYQLDVQLYHCTLLGPASPPAHVLLPPSGPPAPRHLHAQALSDSEIQLTWKHPEALPGPISKYVVEVQVAGGAGDPLWIDVDRPEETSTIIRGLNASTRYLFRMRASIQGLGDWSNTVEESTLGNGLQAEGPVQESRAAEEGLDQQLILAVVGSVSATCLTILAALLTLVCIRRSCLHRRRTFTYQSGSGEETILQFSSGTLTLTRRPKLQPEPLSYPVLEWEDITFEDLIGEGNFGQVIRAMIKKDGLKMNAAIKMLKEYASENDHRDFAGELEVLCKLGHHPNIINLLGACKNRGYLYIAIEYAPYGNLLDFLRKSRVLETDPAFAREHGTASTLSSRQLLRFASDAANGMQYLSEKQFIHRDLAARNVLVGENLASKIADFGLSRGEEVYVKKTMGRLPVRWMAIESLNYSVYTTKSDVWSFGVLLWEIVSLGGTPYCGMTCAELYEKLPQGYRMEQPRNCDDEVYELMRQCWRDRPYERPPFAQIALQLGRMLEARKAYVNMSLFENFTYAGIDATAEEA

An exemplary nucleic acid sequence (SEQ ID NO:1) that encodes Tie1 is asfollows:

atggtctggc gggtgccccc tttcttgctc cccatcctct tcttggcttc tcatgtgggc 60gcggcggtgg acctgacgct gctggccaac ctgcggctca cggaccccca gcgcttcttc 120ctgacttgcg tgtctgggga ggccggggcg gggaggggct cggacgcctg gggcccgccc 180ctgctgctgg agaaggacga ccgtatcgtg cgcaccccgc ccgggccacc cctgcgcctg 240gcgcgcaacg gttcgcacca ggtcacgctt cgcggcttct ccaagccctc ggacctcgtg 300ggcgtcttct cctgcgtggg cggtgctggg gcgcggcgca cgcgcgtcat ctacgtgcac 360aacagccctg gagcccacct gcttccagac aaggtcacac acactgtgaa caaaggtgac 420accgctgtac tttctgcacg tgtgcacaag gagaagcaga cagacgtgat ctggaagagc 480aacggatcct acttctacac cctggactgg catgaagccc aggatgggcg gttcctgctg 540cagctcccaa atgtgcagcc accatcgagc ggcatctaca gtgccactta cctggaagcc 600agccccctgg gcagcgcctt ctttcggctc atcgtgcggg gttgtggggc tgggcgctgg 660gggccaggct gtaccaagga gtgcccaggt tgcctacatg gaggtgtctg ccacgaccat 720gacggcgaat gtgtatgccc ccctggcttc actggcaccc gctgtgaaca ggcctgcaga 780gagggccgtt ttgggcagag ctgccaggag cagtgcccag gcatatcagg ctgccggggc 840ctcaccttct gcctcccaga cccctatggc tgctcttgtg gatctggctg gagaggaagc 900cagtgccaag aagcttgtgc ccctggtcat tttggggctg attgccgact ccagtgccag 960tgtcagaatg gtggcacttg tgaccggttc agtggttgtg tctgcccctc tgggtggcat 1020ggagtgcact gtgagaagtc agaccggatc ccccagatcc tcaacatggc ctcagaactg 1080gagttcaact tagagacgat gccccggatc aactgtgcag ctgcagggaa ccccttcccc 1140gtgcggggca gcatagagct acgcaagcca gacggcactg tgctcctgtc caccaaggcc 1200attgtggagc cagagaagac cacagctgag ttcgaggtgc cccgcttggt tcttgcggac 1260agtgggttct gggagtgccg tgtgtccaca tctggcggcc aagacagccg gcgcttcaag 1320gtcaatgtga aagtgccccc cgtgcccctg gctgcacctc ggctcctgac caagcagagc 1380cgccagcttg tggtctcccc gctggtctcg ttctctgggg atggacccat ctccactgtc 1440cgcctgcact accggcccca ggacagtacc atggactggt cgaccattgt ggtggacccc 1500agtgagaacg tgacgttaat gaacctgagg ccaaagacag gatacagtgt tcgtgtgcag 1560ctgagccggc caggggaagg aggagagggg gcctgggggc ctcccaccct catgaccaca 1620gactgtcctg agcctttgtt gcagccgtgg ttggagggct ggcatgtgga aggcactgac 1680cggctgcgag tgagctggtc cttgcccttg gtgcccgggc cactggtggg cgacggtttc 1740ctgctgcgcc tgtgggacgg gacacggggg caggagcggc gggagaacgt ctcatccccc 1800caggcccgca ctgccctcct gacgggactc acgcctggca cccactacca gctggatgtg 1860cagctctacc actgcaccct cctgggcccg gcctcgcccc ctgcacacgt gcttctgccc 1920cccagtgggc ctccagcccc ccgacacctc cacgcccagg ccctctcaga ctccgagatc 1980cagctgacat ggaagcaccc ggaggctctg cctgggccaa tatccaagta cgttgtggag 2040gtgcaggtgg ctgggggtgc aggagaccca ctgtggatag acgtggacag gcctgaggag 2100acaagcacca tcatccgtgg cctcaacgcc agcacgcgct acctcttccg catgcgggcc 2160agcattcagg ggctcgggga ctggagcaac acagtagaag agtccaccct gggcaacggg 2220ctgcaggctg agggcccagt ccaagagagc cgggcagctg aagagggcct ggatcagcag 2280ctgatcctgg cggtggtggg ctccgtgtct gccacctgcc tcaccatcct ggccgccctt 2340ttaaccctgg tgtgcatccg cagaagctgc ctgcatcgga gacgcacctt cacctaccag 2400tcaggctcgg gcgaggagac catcctgcag ttcagctcag ggaccttgac acttacccgg 2460cggccaaaac tgcagcccga gcccctgagc tacccagtgc tagagtggga ggacatcacc 2520tttgaggacc tcatcgggga ggggaacttc ggccaggtca tccgggccat gatcaagaag 2580gacgggctga agatgaacgc agccatcaaa atgctgaaag agtatgcctc tgaaaatgac 2640catcgtgact ttgcgggaga actggaagtt ctgtgcaaat tggggcatca ccccaacatc 2700atcaacctcc tgggggcctg taagaaccga ggttacttgt atatcgctat tgaatatgcc 2760ccctacggga acctgctaga ttttctgcgg aaaagccggg tcctagagac tgacccagct 2820tttgctcgag agcatgggac agcctctacc cttagctccc ggcagctgct gcgtttcgcc 2880agtgatgcgg ccaatggcat gcagtacctg agtgagaagc agttcatcca cagggacctg 2940gctgcccgga atgtgctggt cggagagaac ctagcctcca agattgcaga cttcggcctt 3000tctcggggag aggaggttta tgtgaagaag acgatggggc gtctccctgt gcgctggatg 3060gccattgagt ccctgaacta cagtgtctat accaccaaga gtgatgtctg gtcctttgga 3120gtccttcttt gggagatagt gagccttgga ggtacaccct actgtggcat gacctgtgcc 3180gagctctatg aaaagctgcc ccagggctac cgcatggagc agcctcgaaa ctgtgacgat 3240gaagtgtacg agctgatgcg tcagtgctgg cgggaccgtc cctatgagcg accccccttt 3300gcccagattg cgctacagct aggccgcatg ctggaagcca ggaaggccta tgtgaacatg 3360tcgctgtttg agaacttcac ttacgcgggc attgatgcca cagctgagga ggcctga 3417

Example 2 Selection and Primary Screening

We have used phage display to select Tie1-specific antibodies from avery large phage library that displays immunoglobulins as Fab fragments.To isolate antibodies specific to Tie1, a phage displayed Fab antibodylibrary was selected against the Tie1 extracellular domain fused tohuman Fc or to a histidine purification tag.

Selection in solution was done using biotin labelled antigen which wascaptured on streptavidin coated magnetic beads (M-280-DYNAL®). Selectionon cells expressing Tie1 was performed using a KINGFISHER™ automatedmagnetic bead capture device. Selection on immobilized antigen wasperformed using Tie1-Fc coated onto immunotubes. Several selectionstrategies were used :

Strategy 1: Round 1 (500 mM biotin labelled Tie1/magnetic beads), Round2 (1×10⁷ Tie1 expressing cells/Kingfisher), Round 3 (1×10⁷ Tie1expressing cells/Kingfisher)

Strategy 2: Round 1 (500 mM biotin labelled Tie1/magnetic beads), Round2 (1×10⁷ Tie1 expressing cells/KINGFISHER™), (300 mM biotin labelledTie1/magnetic beads)

Strategy 3: Round 1 (Tie1 Fc coated immunotubes at 5 μg/ml), Round 2(Tie1-Fc coated immunotubes), Round 3 (Tie1 Fc coated immunotubes plusdepletion with human IgG).

Library members recovered from the selection strategies were tested forantigen binding in phage ELISA. Each isolate was tested for binding tocoated Tie1 Fc. Strategy 1 did not identify any binding clones whereasstrategy 2 identified 13 positive clones (n=95). Strategy 3 identified86 binding clones (n=95).

Sequence analysis of the selected clones were grouped on the basis ofthe CDR3 selected of the heavy chain and resulted in 23 differentantibodies with unique VH-CDR3 sequences.

We reformatted the selected Fabs as completely human antibodies byrecloning the VH and VL coding sequences from the display library vectorinto two vectors of a mammalian expression vector system. These vectorscontain the human kappa constant domain and the human gamma-1 heavychain constant region. The vectors were co-transfected into mammalianCHO-K1 cells for expression and production of the corresponding completeIgGs. These antibodies were characterized using several assays asdescribed below, including: 1. Western blotting and immunoprecipitationof Tie1 transfected cells and primary human endothelial cells; 2.Immunofluorescence of Tie1 transfected cells and primary humanendothelial cells; 3. Stimulation and inhibition of Tie1 in BaF3 cellsand primary human endothelial cells; and 4. Immunostaining of humantissues.

We identified 23 antibodies that interact with Tie1. See FIGS. 7-36.After sequence confirmation of the reformatted clones they were used ina transient transfection of HEK293T cells. After growth the IgG waspurified from culture supernatants using a protein A column. The qualityof purified IgG1 was determined using SDS-PAGE.

The specificity of the Tie1 specific IgG's can be determined in a wholecell ELISA on mouse lung microvascular endothelial cells (LEII) andLEII-Tie1 cells transfected with a Tie1 expression construct. Cells areseeded into 96 well plates at a density of 10,000 cells/well and werefixed using 4% paraformaldehyde. Staining and detection of binding ofIgG1 to LEII cells are detected using standard labelling with a HRPconjugated rabbit anti human HRP and TMB staining. Binding of purifiedIgG1 to LEII-Tie1 transfected cells can also be corrected for Tie1protein that is expressed endogenously. Alternatively cells that havelittle or no endogenous Tie1 can be used for the analysis.

At least one of the binding antibodies—E3—functions as a Tie1 activatingantibody in the BaF3 cell bioassay. We studied Tie1 phosphorylation inresponse to E3 IgG treatment in transiently transfected COSI cells andhuman primary endothelial cells. Our results indicate that E3 IgGactivates the Tie1 receptor. The BaF3 cell bioassay (also referred to asthe “Tie1/EpoR chimericBAF cell assay” may provide an indication of aligand's ability to cross-link the Tie1 receptor. Because the assay isartificial, crosslinking of the non-naturally occurring Tie-Epo fusionproteins may or may not be predictive of a ligand's ability to modulatein vivo function.

E3 can be used, instead of possible natural ligands to characterizeseveral functions of Tie1 in vitro and in vivo. The region of Tie1 whichinteracts with E3 can be the target for small molecular weight compoundsfor Tie1 activation or inhibition.

Although E3 functions in one particular Tie1 activating assay, E3 andother positives in this assay may also have inhibitory effect as toother functions or in other contexts. For example, E3 can inhibit tubeformation by HUVEC cells. See below.

In addition, we found two antibodies that inhibit the survival effectconferred by E3 in the BaF3 cell bioassay. These two antibodies mayinhibit dimerization of Tie1 induced by E3 in the BaF3 assay. Twoantibodies, B2 and D11, completely blocked the viability of Tie1/EpoRcells when used in combination with E3.

Methods

Cell culture. COS1 cells were cultured in Dulbecco's modified Eagle'smedium (DMEM) supplemented with 10% fetal calf serum (FCS), glutamineand antibiotics. The murine BaF3 pre-B lymphocytes were cultured in DMEMsupplemented with 10% FCS, glutamine, antibiotics and 2 ng/mlinterleukin-3 (Calbiochem). Human dermal microvascular endothelial cells(HDMVECs), obtained from PromoCell (Heidelberg, Germany) were culturedin endothelial cell medium provided by the supplier and used at passages4-7.

Western blotting and immunoprecipitation. COSI cells were transfectedwith pcDNA3-Tie1-V5 (1 μg DNA per 10 cm cell culture plate) using FUGENE6 (Roche) according to manufacturer's instruction and incubated for 48 hbefore stimulation. For immunoprecipitation, Tie1 transfected cells andHMVEC cells were lysed in DOC-RIPA lysis buffer (50 mM Tris-HCl pH 8.0,150 mM NaCl, 1% Triton-X-100, 0.1% SDS, 1% DOC, 10 mM EDTA) supplementedwith aprotinin, leupeptin, PMSF and sodium vanadate. Immunoprecipitationwas carried out from equal amount of cell lysates by incubating withpolyclonal anti-human Tie1 antibodies (R&D), monoclonal anti-V5antibodies (Invitrogen) or altogether 23 anti-Tie1 antibodies (1 μg/ml)for 1 to 2 h followed by incubation with protein G-Sepharose (AmershamPharmacia Biotech AB) for 1 h. The immunoprecipitates were washed twicewith PBS-T and twice with PBS, followed by elution with the Laemmlibuffer and separation in 8% SDS-PAGE. The blots were probed with the 23anti-Tie1 antibodies (5 μg/ml) and subsequently anti-human Fc antibodiesconjugated with HRP.

Immunofluorescence staining. COS1 cells on the glass coverslips weretransiently transfected with pcDNA3-Tie1-V5 (the V5-epitope was added tothe 3’ terminus of pcDNA3-Tie1) (1 μg DNA per 10 cm cell culture plate)using FUGENE™ 6 (Roche) according to manufacturer's instruction andincubated for 48 h before staining. Cells were fixed in 4%paraformaldehyde for 10 min at 4° C. If required, the cells werepermeabilized with 0.2% Triton X-100 in PBS for 5 min. Unspecificbinding sites were blocked by incubation with 1% BSA in PBS for 30 min.The cells were then stained with anti-Tie1 antibodies (5 μg/ml) andanti-V5 antibodies for 1 h at room temperature, followed by incubationwith FITC-conjugated anti-human antibodies (DAKO, 40 μg/ml) andTRITC-conjugated anti-mouse antibodies (DAKO, 15 μg/ml) for 30 min.Hoechst 33258 fluorochrome (Sigma, 0.5 μg/ml) was used for the stainingof the nuclei.

BaF3 bioassay. To generate Tie1-EpoR expressing BaF3 cells for thebioassay, BaF3 pre-B cells were stably transfected with a nucleic acidthat expresses chimeric receptor containing the extracellular domain ofhuman Tie1 fused with the transmembrane and cytoplasmic domains of themouse erythropoietin receptor. The nucleic acid used was a Tie1-EpoRchimeric cDNA in a pEF-BOS expression vector. The nucleic acid encodingthe chimeric receptor was constructed by cloning the PCR amplifiedextracellular part of human Tie1 (bp 37-2316 of X60975) as EcoRI-BglIIfragment into mEpoR-pcDNA vector. The cDNA encoding for the chimericreceptor consisting of the extracellular part of Tie1 fused with thetransmembrane and intracellular domains of EpoR was subcloned into thepEF-BOS expression vector. Vector was linearized and co-transfected intoBaF3 cells with pcDNA3.1(+) Zeo vector (Invitrogen). Stable cell poolswere generated by selection with 250 μg/ml Zeocin. The expression ofTie1/EpoR fusion protein in several clones was analyzed by Westernblotting with an antibody against EpoR.

To perform the assays, BaF3 cells expressing the Tie1-EpoR chimera weresplit in 96-well microtiter plates at 50 000 cells/well in the presenceof the indicated concentrations of anti-Tie1 antibodies. The E3 antibodyused in this study was the germ-lined E3 antibody (DX-2220). Ascontrols, Zeocin resistant pools not expressing the Tie1-EpoR were used.After 48 h, the viability of the cells was determined by adding MTT(3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (Sigma),0.5 mg/ml), followed by further 2 h of culture, addition of an equalvolume of cell lysis solution (10% SDS, 10 mM HCl) and incubationovernight at 37° C. Absorbance was measured at 540 nm.

Tie1 phosphorylation assay. COS1 cells were transfected withpcDNA3-Tie1-V5. After 24 h of transfection, the cells were serum starvedfor 8 h and then treated with E3 IgG. For the Tie1 phosphorylationassay, HDMVECs were cultured on 10 cm dishes to near confluence, starved(8-16 h) in serum free medium and stimulated as indicated. After thestimulations, the cells were lysed in lysis buffer (RIPA-DOC: 50 mMTris-HCl pH 8.0, 150 mM NaCl, 1% Triton-X-100, 0.1% SDS, 0.5% DOC, 10 mMEDTA, supplemented with aprotinin, leupeptin, PMSF and sodium vanadate).Clarified lysates from transfected COS 1 cells or HDMVECs wereimmunoprecipitated with anti-V5 or anti-Tie1 B9, respectively. Proteinswere separated by SDS-PAGE, transferred to nitrocellulose andimmunoblotted using the anti-phosphotyrosine and anti-Tie1 (R&D systems)antibodies.

Immunostaining of human tissues. To evaluate reactivity of anti-Tie1antibodies in immunohistochemistry, 5 μm cryosections of human kidneyand lung were dried at room temperature for 30 min and fixed with coldacetone for 10 min. Slides were washed with PBS and treated with 0.03%H₂O₂ in PBS for 15 min to reduce endogenous peroxidase activity. TNB (30min at room temperature) was used to block non-specific binding andsections were incubated with Tie1 antibodies at concentration of 10μg/ml overnight at +4° C. After several washings with PBS, biotinylatedanti human antibody (1:300, Zymed) was added to the tissues. Signal wasamplified by using a TSA kit and detected with AEC staining.

Results

Western blotting, immunoprecipitation and immunofluorescence of Tie1transfected cells and primary human endothelial cells (see Table 1).

TABLE 1 Assay Summary WB: Tie1- WB: IP: Tie1- IP: IF: Tie1- IF: BaF3Clone transfected HDMEC transfected HDMEC transfected HDMEC assay E3 + +ND − + + + G2 + + ++ + + ++ − A2 + + ++ + + ++ − A10 + + ++ + + + −B2 + + + − + + − B9 + + ++ ++ ++ + − C2 + + ++ ++ + ++ − C7 + + ++ + + +− C10 + + ++ ++ ++ + − D11 + + + − + ++ − E11 + + ++ + + ++ − G10 + +++ + ++ + − H1 + + ++ + ++ + − H4 + + ++ + + + − P-A1 + + ++ ++ + ++ −P-A10 + + ++ − + + − P-B1 + + + − weak + − P-B3 + + − − + + − P-C6 + + +− + ++ − P-D12 + + + − + + − P-F3 + + − − ++ ++ − P-F4 + + ++ − cross ++− P-G3 + + ++ + + + − PH1 − − − − − − −

To confirm the binding ability of the 23 selected anti-Tie1 antibodies,we first performed western blotting and immunoprecipitation using COS 1cells transfected with pcDNA3-Tie1-V5 (V5 tagged) and primaryendothelial cells. Next, to find out if the anti-Tie1 antibodiesrecognize Tie1 in living cells, those cells were studied byimmunofluorescence staining. All the antibodies analyzed recognized bothtransfected and endogenous Tie1, although differences were detected inthe binding affinity as shown in Table 1.

Stimulation and inhibition of Tie1 in Tie1-EpoR transfected BaF3 cellsand human primary endothelial cells. Although no ligand for Tie1 hasbeen identified, we used the following efficient screening method forTie1-binding proteins. Interleukin-3 dependent pre-B-lymphocyte (BaF3)cells were transfected with a construct that expresses a Tie1-EpoRfusion protein. Since BaF3 cells are IL-3 dependent, they die unlessIL-3 is provided. However, Tie-EpoR receptor expressing BaF3 cells cansurvive and proliferate if the medium contains a Tie1-binding protein,either a natural ligand or an artificial mimetic. Cell survival can bequantitated, e.g., by colorimetric MTT-assay, which measuresmitochondrial activity.

The results from the BaF3 cell assays indicated that, of the 23different monoclonal antibodies tested, only E3 IgG was able to promotesurvival of Tie1-EpoR cells whereas the viability of EpoR BaF3 cellsused as a control was not affected by E3 IgG. The IgG part of theimmunoglobulin molecule was needed for the survival effect of E3 IgG, asthe E3 Fab fragment had no effect on the viability of Tie1-EpoR cells. Aconcentration of 50 ng/ml of E3 IgG gave almost maximal viability inTie1-EpoR cell survival assays and the viability was dose dependent.

To test if the E3 IgG binding to the extracellular region of Tie1induces autophosphorylation of Tie1, the Tie1 receptor phosphorylationlevel in response to E3 IgG treatment was studied in transientlytransfected COS 1 cells and human primary endothelial cells. COS 1 cellswere transfected with an expression vector containing a V5-tagged fulllength Tie1 cDNA, and, after serum starvation, the cells were treatedwith E3 IgG (200 ng/ml). Cell lysates were extracted at several timepoints and Tie1 was immunoprecipitated with anti-V5 followed by westernblotting using anti-phosphotyrosine and anti-Tie1 antibodies. Theresults indicated that Tie1 is tyrosine phosphorylated after 10 to 30min of E3 IgG stimulation. To determine if E3 IgG induces Tie1phosphorylation in primary endothelial cells, HDMVEC cells were serumstarved and stimulated with several concentrations of E3 for 60 min.Tie1 was then immunoprecipitated from cell lysates and subjected toanti-phosphotyrosine blotting analysis, which showed receptorphosphorylation following E3 IgG stimulation at 50-200 ng/ml. Alsohigher concentrations of E3 (500-1000 ng/ml) induced Tie1phosphorylation but the response was more rapid and was most prominentafter 5 min of stimulation.

To study the kinetics of E3 IgG induced Tie1 activation, cells werestimulated with E3 IgG (200 ng/ml) and receptor phosphorylation wasstudied at various time points. Tie1 phosphorylation was highest 15-30min after E3 IgG treatment but phosphorylation persisted for up to 1 h.

To determine if any of the other monoclonal antibodies tested inhibitthe survival effect of E3 IgG in Tie1-EpoR BaF3 assay, antibodies werestudied in combination with E3 IgG. A concentration of 100 ng/ml of E3IgG together with 100 (1:1) or 500 (1:5) ng/ml of the other antibodieswere used and the viability of Tie1-EpoR cells was measured. The resultsfrom both combinations of E3 IgG and the test antibody (in 1:1 and 1:5ratios) were similar and indicated that two of the 23 antibodies (B2 andD11) blocked completely the survival effect of E3 IgG. Severalantibodies (A2, A10, P-B1, P-B3 and P-C6) inhibited the viability effectof E3 IgG to some extent and two of the antibodies (G2 and C7) promotedthe survival of Tie1/EpoR BaF3 cells in combination with E3 IgG.

Immunostaining of human tissues. The anti-Tie1 antibodies react withhuman Tie1 in cultured cells. It is also possible to determine whetherthey could stain human tissue samples from lung and kidney as well asfrom tumors by using biotinylated anti-Tie1 antibodies and detectingbound antibodies using labeled streptavidin or avidin.

Example 3 Exemplary Sequences

Sequences of exemplary immunoglobulin variable domains are shown inFIGS. 7-36.

Example 4 Inhibition of Tube Formation by HUVEC Cells Using Anti Tie1E3-IgG

To demonstrate the ability of E3 to inhibit angiogenesis in vitro,purified E3 was tested for its ability to inhibit tube formation byhuman umbilical cord endothelial cells (HUVECS). Human Umbilical veinendothelial cells (HUVEC) were obtained by treating fresh humanumbilical cord veins with Trypsin-EDTA (1×) (Gibco/Invitrogen) for 20-25minutes at 37° C. The cells were cultured in a T-25 flask coated withattachment factor (AF), (Cascade Biologics) in RPMI 1640 mediumsupplemented with 10% FCS, 0.4% BBE, 1% 1-glutamin, 1%penicillin/streptomycin. Primary cultures were detached with warmTrypsin-EDTA and used when confluent at the second or third passage. Thecells were maintained in a proliferative state by culturing them in asplit ratio 1:2 at an approximate density of the monolayer of about60-80%. To dissociate the cells, HUVEC monolayers were treated withtrypsin/EDTA (500 μl/dish) at 37° C. for 3 min. Trypsin activity wasstopped by adding 3 volumes of complete RPMI medium. The cells werecarefully scraped, separated by repeated pipetting, and finally washedwith PBS.

After 2 passages HUVECs were seeded in their culture medium (40×10³/50μl/well of a 96-well plate) on a collagen gel (50 μl of collagen I 1.5mg/ml) prepared by mixing 7.5 volumes of 2 mg/ml collagen (Collagen R;Serva, Heidelberg, Germany), 1 volume of 10× MEM, 1.5 volume of NaHCO₃(15.6 mg/ml) and ˜1 volume of NaOH to adjust the pH to 7.4. After 1.5h,the culture medium was then discarded and the cells were covered with anew layer of collagen (1.5 mg/ml, new preparation, 50 μl/well). Afterpolymerization of the gel, culture medium was added to each well inpresence or in absence of E3 antibody (1 ng/ml to 10 μg/ml). The assaywas performed with a streptavidin antibody used as a control (from 1ng/ml to 10 μg/ml): The total length of the tube network on the culturesurface was quantified at 40× magnification by the METAVUE™ Software(Universal Imaging Corporation). Results from triplicate wells wereexpressed as mean vessel area per field ±SEM (relative units). Eachassay was performed at least three times.

E3 is a potent inhibitor of tube formation by HUVECS even at aconcentration of 10 ng/ml. The control anti-streptavidin has no effecton the ability of HUVECS to form tubes. This results indicates that E3can inhibit at least one aspect of angiogenesis.

Example 5 Immunohistochemical Analysis of E3 Binding to Matched Tumorand Normal Tissue Sections

To evaluate the binding of E3 to Tie1 in primary tumor and normal tissuethe antibody was produced as an IgG and biotin labeled. The E3 antibodyand two other anti Tie1 antibodies B2 and D11 were reformatted as fulllength IgG molecules. Nucleic acids encoding these IgGs were transientlytransfected into HEK293T cells. Plasmid preparations for transient celltransfections were performed using the HP-GENELUTE™ MIDI prep kit(Sigma, cat. no. NA0200). HEK293T cells (GenHunter Corp. cat. no. Q401)were seeded 24 hours before transfection; 6×10⁶ cells were plated per10-cm culture dish. Transfections were carried out using LIPOFECTAMINE™2000 reagent (Invitrogen, cat. no. 11668019) following themanufacturer's instructions. Five micrograms of plasmid DNA was used per10-cm dish. Cells were cultured in DMEM (Invitrogen, cat. no. 31966021)supplemented with 10% “ultra-low IgG” fetal calf serum (Invitrogen, cat.no. 16250078), at 37° C., 5% CO₂, in a water saturated atmosphere.Conditioned media were harvested 72 hours and 144 hours aftertransfection, pooled and sterile filtered.

One hundred microliters of Protein A beads (rProtein A Sepharose 4 FastFlow, Amersham Biosciences, cat. no. 17-1279-01) equilibrated in PBSwere added to the cell culture supernatants, and these were rotatedovernight at 4° C., e.g., in 50 ml tubes. The beads were collected bycentrifugation, transferred to a 96-well filter plate (UNI-FILTER 800GF/B, Whatman, cat. no. 7700-2803) and washed extensively with PBS usinga vacuum manifold (Macherey Nagel, cat. no. 760681). Elution of theantibodies was achieved by resuspending the beads in 400 μl of 12.5 mMcitric acid. After a 30 to 60 second incubation, the bead eluates werecollected, using the vacuum manifold, into the wells of a 96-wellcollection plate (UNIPLATE 750, Whatman, cat. no. 7701-5750). Each wellof the collection plate contained 60 μl of 1 M HEPES pH 7.5 buffer toimmediately neutralize the eluted fractions. The elution step wasperformed twice to maximize antibody recovery. The eluted samples werethen dialyzed against PBS using dialysis cassettes (Slide-A-LyserDialysis Cassettes, MWCO 10,000, Pierce, cat. no. 66380) and proteinconcentration was determined from the absorbance at 280 nm assuming thata 1 mg/ml solution has an absorbance of 1.35. The quality of thepreparations was analyzed by reducing and non-reducing SDS-PAGE.

The Tie1 antibodies were biotinylated using the EZ-linkSulfo-NHS-SS-Biotin (Pierce, Cat. 21331). For Tie1/Fc and Tie1-His, thereaction was performed for 2 hours on ice in 50 mM sodium carbonatebuffer, pH 9.6, in the presence of a 5-fold molar excess ofbiotinylating agent. For the antibodies, the reaction was performed for2 hours on ice in PBS, in the presence of a 15-fold molar excess ofEZ-link Sulfo-NHS-SS-Biotin. The reaction was stopped by the addition ofTris-HCl, pH 7.5 (50 mM final concentration) followed by a 1-hourincubation on ice. Samples were then dialyzed against PBS.

Various normal and tumor tissue sections were stained with biotinylatedantibodies. A mouse monoclonal anti-Tie1 antibody (7e8) (Alitalolaboratory, University of Helsinki) was used as a positive control.Sections without primary antibody served as negative control. Allsamples were fresh frozen tissues and staining was performed with theTSA-kit (Perkin-Elmer Life Sciences). After acetone fixation (10-20 min,−20° C.) the slides were treated with 0.73% H₂O₂ for 10 min to reduceendogenous peroxidase activity followed by blocking for 30 min with TNBbuffer. Sections (5-10 mm thick) were incubated with primary antibodies(10 μg/ml) overnight at 4° C. Sections with the mouse monoclonalanti-tie1 antibody (7e8) were treated with biotinylated anti-mouseantibodies (VectaStain) before the addition of streptavidin-HRP. Signalwas amplified by using a TSA kit and the visualized by AEC (235 mlNaAc,15 ml AEC (stock solution: 1600 mg 3-amino-9-ethyl-carbazole and480 ml N-dimethylformamide), 250 μl H₂O₂).

In general, Tie1 expression was upregulated in tumor tissue whencompared with matching normal tissue. However, in the tumor tissues theanti Tie1 antibodies stained other structures in addition to thevessels. Furthermore, some tissue specificity in the expression ofcertain epitopes was observed. For example, the E3 antibody stainedvessels in the lung and kidney but not in the skin while the B2 antibodystained vessels very faintly in other normal tissues than in the breast.Shedding of the ectodomain of Tie1 into the tumor tissues can explainobserved differences.

In skin tissue, the E3, B2, and D11 antibodies stained blood vesselsvery faintly whereas the murine 7e8 control antibody gave a clearstaining in the normal skin. In melanoma tissue, the 7e8 antibodystained vessels only but the E3, B2, and D11 antibodies also stainedother surrounding structures. The staining pattern was similar with allthree of the E3, B2, and D11 antibodies.

In lung tissue, we observed that the E3 antibody stained especiallyclearly the large veins in the lung, whereas D11 and 7e8 gave a faintstaining. B2 did not stain the same veins. The expression of Tie1 wasdramatically upregulated in lung carcinoma and all the antibodiesstained vessels more strongly in samples with lung carcinoma than insamples from normal lung. In the lung tumors, the E3, B2, and D11antibodies stained structures other than vessels.

In kidney, the E3 and D11 antibodies stained kidney tubules in additionto the vessels. B2 gave only very faint staining of either tubules orvessels while 7e8 stained only vessels. In hypernephroma tissue, onlythe E3 antibody gave a clear staining.

In breast, E3 gave the brightest staining in the veins and capillariesof the mammary tissue, B2 and 7e8 gave a similar staining while D11stained those structures rather faintly. In breast carcinoma the Tie1expression was substantially upregulated, and the E3, B2, and D11antibodies stained also other structures in addition to vessels.

Example 6 Binding to Mouse Endothelial Cell Lines of Anti Tie1 E3-IgGUsing Flow Cytometry

We evaluated if E3 cross reacts with mouse Tie1 in situ and thus if wecan evaluate E3 activity in mouse tumor xenograft models binding tomouse endothelial cells was tested and compared with human andtransfected cell lines.

Specific binding of the Tie1 antibodies and of control Mabs to mouseendothelial cells was measured by flow cytometry analysis (FACSscan,Becton Dickinson, Oxnard, Epics, Coulter). Mouse endothelial cell linesMS1, Le-2, Bend3, SVEC (ATCC, Rockville) and Tie1 transfected Le-2 cellswere stained. Cell staining was modified from existing protocols. About200,000 cells were used in each experiment: after trypsinization, cellswere washed one time in PBS and resuspended PBS, 10% heat inactivatedhuman serum (incubation buffer). To test specificity, antibodies wereincubated at different dilutions for 1 h at room temperature. Cells werespun down by centrifugation for 3 min at 611 g. Between incubationscells were washed twice with PBS. Then relevant biotinylated antibodies(A2 against streptavidin, E3 against Tie1, were added and incubated for1 h at room temperature). The E3 DX-2210 antibody, in which the lightchain has been germlined, was used for these studies. This was followedby incubation with Strepatvidin-R-phycoerythrin (Dako, Glostrup,Denmark) for 1 hour at room temperature in incubation buffer. After thefinal incubation step bound antibodies were detected by means of flowcytometry on a FACSCan and Epics Altra (Becton Dickinson, Oxnard,Coulter) and results analyzed.

Intracellular Tie1 was measured as described above, except for theaddition of Saponin to the incubation buffer to a final concentration of0.1% during incubations. The anti-Tie1 antibody E3 binds to mouseendothelial cell lines indicating a cross reactivity of E3 with mouseand human Tie1 in situ. The binding pattern in mouse cell lines detectedby flow cytometry is different from the binding pattern in HUVEC in thatin mouse cells there is a greater cell surface staining than thatcompared to primary human endothelial cell lines. DX-2210 stainedpositively both mouse endothelial cell lines as well as the HUVECcontrol cells. There was a shift in the fluorescent signal when thecells were treated with saponin, indicating a significant intracellularpool of sequestered Tie1.

Example 7 Determination of anti Tie1 E3-IgG Binding to Human PlateletsUsing Flow Cytometry

Binding experiments with a purified polyclonal goat antiserum againstTie1 (R&D systems) had showed binding to human platelets in a previousstudy (Tsiamis et al., (2000) J. Vasc. Res. 37:437-42). The conclusionform this study was that platelets represent a large pool of Tie1immunoreactivity which could present a problem for development of Tie1as a therapeutic target. To determine if the antibody E3 binds toplatelets we performed flow cytometric analysis on both activated andinactivated platelets and compared the staining pattern with thepurified anti Tie1 polyclonal serum.

To avoid platelet activation, human platelets were isolated from plasmaof healthy donors using the platelet GelSep kit (Biocytex, Marseille,France) kit according to the guidelines of the manufacturer. Plateletswere activated by the addition of thrombin to a final concentration of0.8 U/ml. To distinguish activated from non-activated platelets doublestaining was performed with Tie1 antibodies/control antibodies andantibody CD42 (total platelets) or CD62 (activated platelets).

After preparation, platelets were resuspended in buffer 2 of the GelSepkit, 10% heat inactivated human serum (incubation buffer) and incubatedfor 1 hour. To test specificity, biotinylated antibodies humananti-Tie1(E3), human anti-streptavidin (A2-SV, an antibody that does notbind Tie1), human anti-FITC and goat anti-Tie (R&D systems) wereincubated with 500 000 platelets per test for 1 hour at differentdilutions (2 μg/ml, 10 μg/ml) for 1 h at room temperature. Plateletswere spun down by centrifugation for 10 min at 611 g. Betweenincubations platelets were washed twice with Buffer 1 of the GelSep kit.Then, Strepatvidin-R-phycoerythrin together with anti-CD42-PercP oranti-CD62-PercP were incubated for 30 minutes at room temperature inincubation buffer After the last incubation and washing detection ofbound antibodies was performed by means of flow cytometry on a FACSscanand Epics Altra (Becton Dickinson, Oxnard, Coulter,) and resultsanalyzed. Cells were gated on SSC and anti-CD42-PercP for the totalplatelets in case non-activated platelets were used and on SSC andanti-CD62-PercP for the activated platelets.

The polyclonal goat anti-Tie1 antibody indeed binds to platelets underthe conditions tested. This binding is lower when platelets areactivated. In contrast, the human anti-Tie1 antibody E3 shows nosignificant binding to total platelets, nor to activated platelets (FIG.1).

Example 10 Assessment of Tie1 Immunoreactivity in Human Platelets UsingImmunoprecipitation with Anti Tie! E3-IgG

A previous study with a purified polyclonal goat antiserum against Tie1(R&D Systems) had showed binding to human platelets (Tsiamis et al.,2000). The conclusion from this study was that platelets represent alarge pool of Tie1 immunoreactivity which could present a problem fordevelopment of Tie1 as a therapeutic target. To exclude the possibilitythat the antibody E3 binds to platelets immunoprecipitation of lysatesprepared from platelets and HUVECS were performed. Both activated andinactivated platelets were tested. Anti-Tie1 antibodies B2, D11, E3, thegoat polyclonal AF619 (R&D) and negative control antibodies anti-FITCand anti-Streptavidin were used. HUVECS were retrieved from culturedishes by trypsinization and platelets were prepared with the plateletGelSep kit (Biocytex, Marseille, France) kit according to the guidelinesof the manufacturer. Per immunoprecipitation experiment 3-5×10⁶ and3×10⁸ cells platelets were used for each antibody tested. Platelets andcells were washed with PBS and spun down at 1400 rpm for 4 minutes andsupernatant was removed. Then cells were lysed in 1 ml lysis buffercontaining 50 mM Tris HCL pH 7.5, 150 mM NaCl, 0.5% Deoxycholic acid(DOC) and 0.5% NP-40 for 5 minutes. The lysed cells were spin down for10 minutes at 14.000 rpm and 5 μg/ml antibody was added to thesupernatant and incubated at 4° C. on a rotator. 100 μl/sample protein Abeads (Uppsala, Sweden) were washed 3 times with lysis buffer(centrifugation speed: 15 seconds, 2000 rpm) then cell lysates incubatedwith antibody were added for 30 minutes 4° C. Then beads were washedthree times with washing buffer containing 50 mM Tris HCL pH 7.5, 400 mMNaCl, 0.5% DOC, 0.5% NP-40. Finally, beads are spun down and the pelletswas resuspended in an equal amount in sample buffer to perform SDS-pageand Western blotting. In Western blotting Tie1 was detected with thepolyclonal goat anti-Tie1 antibody. The conclusions of this study arethat E3 is able to immunoprecipitate Tie1 in HUVEC but not in platelets.

Example 8 Distribution of Tie1 in HUVEC Cells Determined by Stainingwith Anti Tie1 E3-IgG

We analyzed the staining pattern of E3 in HUVECS using confocalmicroscopy. HUVEC were trypsinised, washed with PBS and spotted at adensity of 60 000 cells on a gelatine coated microscope slide andincubated for 24 hours in a humidified incubator at 37° C. Cells wereair dried and fixed with 4% paraformaldehyde for 20 minutes at roomtemperature. The slides were washed with PBS. The slides were incubatedwith 10% Heat inactivated human serum (incubation buffer).

For measuring specific binding to Tie1, biotinylated antibody E3 andbiotinylated negative control antibody A2 were used at a concentrationof 10 μg/ml and incubated for 1 hour at room temperature. Slides werewashed twice with PBS. Then, Strepatvidin-R-phycoerythrin (Dako,Glostrup, Denmark) was added and incubated for 1 hour at roomtemperature. After the last incubation and washing detection of boundantibodies was performed by means of confocal microscopy.

E3 binds specifically to HUVEC as detected by confocal microscopy. Thestaining is pre-dominantly located inside of the cell which suggests alarge intracellular pool of Tie1 relative to a smaller pool of cellsurface localized Tie1. The localization of E3 was consistent withco-localization of Tie1 with a cytoskeletal protein.

Example 9 Conversion of Somatic Mutations Positioned in the FrameworkRegion of Anti Tie1 E3 to Germline Residues

To reduce potential immunogenicity of E3 in humans, all non germlineamino acid residues in the LC framework regions were corrected back togermline. An initial analysis was performed which aligned the LC of E3with a database containing all kappa and lambda light chain germlinegenes. The LC of E3 was shown to have closest homology to DPK4 and threesubstitutions in E3 relative to the germline framework regions wereidentified.

We constructed a germlined version of E3 in which the LC frameworkregions were altered to include sequences identical to the DPK4 germlineframework regions. The germlined E3 antibody was constructed byengineering a nucleic acid encoding the desired sequence. Changes tonucleic acids encoding the E3 LC variable domain were made by PCR andother standard molecular biological techniques and verified by nucleicacid sequencing.

An exemplary germlined light chain variable domain E3 sequence includes:DIQMTQSPSSLSASVGDRVTITCRASQGIGHYLAWYQQKPGKVPKLLIYTASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDVATYYCQQFNSYPHTFGQGTRLEIK (SEQ ID NO: 159). Thealtered positions are underscored.

We produced the germlined version of the E3 antibody as both a solubleFab and as an IgG. The Fab cassette of the positive sFAB-expressingclone was PCR amplified with oligonucleotides, ligated into a mammalianexpression vector containing the human IgG4 Fc region and electroporatedinto XL1 Blue MRF′ cells. The prokaryotic ribosomal binding sequence andgene three leader sequence were replaced with a mammalian internalribosomal entry and heavy chain leader sequences. Reformatted antibodyclones were sequenced to confirm accuracy following the cloningprocedure. Endotoxin-free DNA was prepared and used for transienttransfection studies.

Example 10 Production and Testing of Germlined Anti Tie1 E3—Fab forBinding to Recombinant Tie1-Fc in ELISA

To evaluate if the conversion of any of the somatic mutations in theframework of E3 back to germline residues had any effect on bindingactivity the soluble Fabs were produced. The soluble expression vectorcontaining the parental E3 Fab and the germlined E3 Fab construct weregrown overnight at 30° C. in 2×TY broth containing 100 μg/ml ampicillinand 2% glucose and use 4 ml of this overnight culture to inoculate 400ml of 2×TY broth containing 100 μg/ml ampicillin and 0.1% glucose. Cellswere grow at 37° C. until an OD₆₀₀ of 0.8-1.0, 1 mM IPTG was added andthe culture was maintained at 30° C. for 4 hours. The cultures were spundown at 4,000 rpm for 15 min at 4 C. The supernatants were discarded andresuspend the pellets resuspended in 4.8 ml of ice cold TES buffer (0.2M Tris-HCl, 0.5 mM EDTA, 0.5 M sucrose, pH 8.0) containing proteasesinhibitors (protease inhibitor cocktail tablets [Roche]: dissolve 1tablet in 1 ml of water and dilute 50-times in TES buffer). Transfer to50 ml Falcon tubes and place on ice for 5-10 min. During thisincubation, wash the centrifugation bottles with 5.25 ml TES:H₂O (1:3)containing proteases inhibitors and add this to the cells. Incubate for20 more min on ice. Spin at 3000 g for 15 min at 4° C. and transfer thesupernatants into new centrifugation tubes. Resuspend the cell pelletsin 6 ml TES containing 15 mM MgSO₄ and proteases inhibitors and incubateon ice for 15 min. Centrifuge at 3000 g for 15 min at 4° C. Transfer thesupernatants into the centrifugation tubes and spin at 8000 g for 20 minat 4° C. Collect the supernatants and dialyze against PBS. The Fabs werepurified by metal chelate chromatography. Incubate the dialyzedperiplasmic extracts with 1 ml of TALON™ Metal Affinity Resin (Clontech)and rotate at room temperature for 2 hours. Transfer the beads intoempty gravity column (Poly-Prep chromatography columns, Bio-Rad, Cat.731-1550). Wash the beads with 5 mM imidazole in PBS and elute the Fabswith 150 mM imidazole in PBS. Dialyze against PBS using dialysiscassettes (SLIDE-A-LYSER™ Dialysis Cassettes, MWCO 10,000, Pierce, cat.no. 66380) and determine the protein concentration from the absorbanceat 280 nm assuming that a 1 mg/ml solution has an absorbance of 0.86.The quality of the preparations can be analyzed by reducing andnon-reducing SDS-PAGE.

Wells of an IMMULON™ 2 HB plate coated overnight with 500 ng or 50 ng ofpurified recombinant human Tie1-Fc target antigen per 100 microliters0.1 M sodium bicarbonate buffer, pH 8.5. Parental E3, E3 germlined (E3g)or a negative control soluble Fab were loaded into wells at either 5micrograms or 1 microgram per 100 microliters of PBST. Recombinant humanTie1-Fc target antigen is dissolved in an appropriate amount of aceticacid and subsequently diluted into 0.1 M sodium bicarbonate buffer, pH9.6 at final concentrations of 500 ng and 50 ng per 100 microliters.After addition of the target antigen to the wells the microtitre plateis incubated overnight at 4° C. The plate is subsequently washed 5 timeswith PBST and blocked with 1% BSA in PBS at 37° C. for 2 hours. Theplate is again washed plate times with wash buffer, PBST and 100microliters per well of purified Fab at 5 or 1 micrograms per 100microliter PBST was added followed by incubation at room temperature for1 hour. After washing plate 7 times with PBST 100 microliters of a1:5000 dilution of anti-sFab-HRP in PBST was added (Pierce Product#31414). After washing the wells seven times 100 microliters TMB-H₂O₂solution was added to each well and the plate read at 630 nm in anELISA. Both E3 and germlined E3 bound to the recombinant human Tie1-Fctarget antigen by this assay.

Example 11 Production and Testing of Germlined Anti Tie1-E3—Fab forBinding to Recombinant Human Tie1 in BIAcore

Recombinant purified human Tie1-Fc antigen (Stock 2.45 mg/ml) wasbiotinylated using the EZ-link Sulfo-NHS-SS-Biotin (Pierce, Cat. 21331).The reaction was performed for 2 hours on ice in 50 mM sodium carbonatebuffer, pH 9.6, in the presence of a 5-fold molar excess ofbiotinylating agent and was stopped by the addition of Tris-HCl, pH 7.5(50 mM final concentration) followed by a 1-hour incubation on ice.Samples were then dialyzed against PBS. The antigen was then diluted1/100 fold in HBS and was then captured onto a streptavidin chip. Thiswas coated to a density of 830RU (resonance units). All analysis wasperformed in HBS buffer. The parental Fab E3 and germlined E3 Fab wereprepared as described above. A stock solution of 0.587 mg/ml (11740 nM)was diluted 1/587 in HBS+BSA to obtain a stock of 20 nM and thegermlined Fab E3 0.025 mg/ml (500 nM) was diluted 1/25 in HBS+BSA toobtain a stock of 20 nM. Serial dilutions were made of each Fabpreparation to obtain 10 nM, 5 nM, 2.5 nM, and 1.25 nM solutions. Forthe association phase samples were injected at 30 μl/min for 4 minutesusing kinject program. This was followed by a 10 minutes dissociationphase, any remaining sample was stripped from the Tie1 Fc surface at aflow of 50 μl/min with a single injection of 5 mM NaOH+1M NaCl for 18seconds. All samples were run and analyzed in duplicate.

Sensorgrams were analyzed using the simultaneous ka/kd fitting programwith 1:1 model in the BIAEVALUATION™ software 3.1. From the analysis wecan see that the germlining of the E3 antibody has had minimal effect onthe binding activity of the antibody.

TABLE 2 Comparison of the binding affinity of parental and germlined E3Fab E3 Fab Tie1 Fc k_(on) (1/Ms) k_(off) (1/s) K_(D)(1) nM parentalHuman 3.00E+05 6.10E−04 2.0 germlined Human 3.00E+05 1.02E−03 3.4

Example 12 Comparison of Affinity of Germlined Anti Tie1 E3—IgG toParental Anti Tie1 E3 for Binding to Recombinant Human Tie1 UsingBIAcore

In order to evaluate if the binding behavior had been affected in anyway by the conversion of the somatic mutations back to germlineresidues, the germlined antibody was produced and tested as an IgG. Thegermlined E3-IgG construct used to transiently transfect HEK293T cellsand purified.

The germlined E3 IgG1 stock solution 0.63 mg/ml was diluted 1/50 in abuffer of pH4.5 and the parental E3 IgG1 stock solution 0.56 mg/ml(2143-001) was diluted 1/50 in a buffer of pH 4.5. The IgG were directlycoated onto a CM5 chip. The surface of the chips was activated with a 7minute pulse of 0.05M NHS/0.2M EDC and the IgG was flowed over until780RU germlined E3-IgG and 728 non germlined E3 IgG was coated onto thesurface. All flow cells were subsequently deactivated with a 7 minutepulse of 1M ethanolamine hydrochloride pH 8.5. All analysis wasperformed in HBS buffer. Purified recombinant human Tie1 Fc was diluted1/28.7 in HBS to obtain a 400 nM stock solution. Serial dilutions weremade to obtain 200 nM, 100 nM, 50 nM and 25 nM Tie1 Fc stocks. Foranalysis of the association phase samples were injected at 30 μl/min for8.3 minutes using kinject program. This was followed by a 40 minutesdissociation phase. Any antigen remaining associated to the surface wasstripped from the IgG surface at a flow of 50 μl/min with two injectionsof 10 mM glycine pH 1.5 for 30 seconds. All samples were run andanalyzed in duplicate

Sensorgrams were analyzed using the simultaneous ka/kd fitting programwith 1:1 model in the BIAEVALUATION™ software 3.1. Germlining hadminimal impact on the binding activity of the E3 IgG with respect tohuman Tie1 Fc.

TABLE 3 Comparison of the binding affinity of parental and germlined E3IgG E3 IgG Tie1 Fc k_(on) (1/Ms) k_(off) (1/s) K_(D)(1) nM parentalHuman 6.19E+03 3.61E−05 5.83 germlined Human 7.09E+03 3.67E−05 5.17

Example 13 Production and Testing of Germlined Anti Tie1-E3—Fab forBinding to Recombinant Mouse Tie1 in BIAcore

Mouse Tie 1-Fc antigen (0.5 mg/ml stock) was biotinylated usingestablished procedures and after dilution 1/100 fold in HBS this wasthen used for capturing to a streptavidin chip. This was coated to aresonance value of 740RU. All analysis was performed in HBS buffer. Theparental Fab E3 0.587 mg/ml (11740 nM) was diluted 1/587 in HBS+BSA toobtain a stock of 20 nM and the germlined Fab E3 0.025 mg/ml (500 nM)was diluted 1/25 in HBS+BSA to obtain a stock of 20 nM. Serial dilutionswere made of each Fab preparation to obtain 10 nM, 5 nM, 2.5 nM, and1.25 nM. For the association phase samples were injected at 30 μl/minfor 4 minutes using kinject program. This was followed by a 10 minutesdissociation phase, any remaining sample was stripped from the Tie1 Fcsurface at a flow of 50 μl/min with a single injection of 50 mM NaOH+1 MNaCl for 18 seconds. All samples were run and analyzed in duplicate.

Sensorgrams were analyzed using the simultaneous ka/kd fitting programwith 1:1 model in the BIAEVALUATION™ software 3.1. The germlining of theE3 antibody has had minimal effect on the binding activity of theantibody.

TABLE 4 Comparison of the binding affinity of parental and germlined E3Fab E3 Fab Tie1 Fc kon (1/Ms) koff (1/s) KD(1) nM parental Mouse2.46E+05 9.50E−04 3.9 germlined Mouse 3.40E+05 1.04E−03 3.1

Example 14 Comparison of Affinity of Germlined Anti Tie1 E3—IgG toParental Anti Tie1 E3 for Binding to Recombinant Mouse Tie1 UsingBIAcore

In order to evaluate if the binding behavior had been affected in anyway by the conversion of the somatic mutations back to germline, thegermlined antibody was produced and tested as an IgG. The germlined E3was reformatted to an IgG as described. This was then used totransiently transfect HEK293T cells using established procedures. TheIgG was purified from the culture supernatant using protein A columnchromatography using established procedures and the subsequent IgG wasthen tested for binding activity using surface plasmon resonance(BIAcore). The germlined E3 IgG1 stock solution 0.63 mg/ml (2146-002)was diluted 1/50 in a buffer of pH 4.5 and the parental E3 IgG1 stocksolution 0.56 mg/ml (2143-001) was diluted 1/50 in a buffer of pH 4.5.The IgG were directly coated via onto a CM5 chip. The surface of thechips was activated with a 7 minute pulse of 0.05M NHS/0.2M EDC and theIgG was flowed over until 780RU germlined E3-IgG and 728 non germlinedE3 IgG was coated onto the surface. All flow cells were subsequentlydeactivated with a 7 minute pulse of 1M ethanolamine hydrochloridepH8,5. All analysis was performed in HBS buffer. Purified recombinantmouse Tie1 Fc was diluted 1/6,5 in HBS to obtain a 400 nM stocksolution. Serial dilutions were made to obtain 200 nM, 100 nM, 50 nM and25 nM Tie1 Fc stocks. For analysis of the association phase samples wereinjected at 30 μl/min for 8.3 minutes using kinject program. This wasfollowed by a 40 minutes dissociation phase. Any antigen remainingassociated to the surface was stripped from the IgG surface at a flow of50 μl/min with two injections of 10 mM glycine pH1.5 for 30 seconds. Allsamples were run and analyzed in duplicate

Sensorgrams were analyzed using the simultaneous ka/kd fitting programwith 1:1 model in the BIAEVALUATION™ software 3.1. The germliningprocess had minimal impact on the binding activity of the E3 IgG withrespect to mouse Tie1-Fc.

TABLE 5 Comparison of the binding affinity of parental and germlined E3IgG E3 IgG Tie1 Fc kon (1/Ms) koff (1/s) KD(1) nM parental Mouse6.17E+03 9.20E−05 14.9 germlined Mouse 6.00E+03 8.99E−05 15

Example 15 Comparison of IC₅₀ of Germlined Anti Tie1-E3 and ParentalAnti Tie1-E3 in Tube Formation Assays using HUVEC Cells

Germlined E3 (DX-2220) and its parental antibody (DX-2200) wereevaluated in the tube formation assay in a collagen type-I matrix. HumanUmbilical vein endothelial cells (HUVEC) (freshly isolated) wereobtained by treating human umbilical cord veins with Trypsin-EDTA (1×)(Gibco/Invitrogen) for 20-25 minutes at 37° C. The cells were thencultured in a T-25 flask coated with attachment factor (AF), (CascadeBiologics) in RPMI 1640 medium supplemented with 10% FCS, 0.4% BBE, 1%1-glutamin, 1% penicillin/streptomycin. Primary cultures were detachedwith warm Trypsin-EDTA and used when confluent at the second or thirdpassage. During culturing, the cells were kept in a proliferative stateby culturing them in a split ratio 1:2 at an approximate density of themonolayer of about 60-80%. HUVEC monolayers were treated withtrypsin/EDTA (500 μ/dish) at 37° C. for 3 min. Trypsin activity wasstopped by adding 3 volumes of complete RPMI medium. The cells werecarefully scraped, separated by repeated pipetting, and finally washedwith PBS. HUVECs (passage 2) were seeded in their culture medium(40×10³/50 μl/well of a 96-well plate) on a collagen gel (50 μl ofcollagen I 1.5 mg/ml) prepared by mixing 7.5 volumes of 2 mg/ml collagen(Collagen R; Serva, Heidelberg, Germany), 1 volume of 10× MEM, 1.5volume of NaHCO3 (15.6 mg/ml) and ˜1 volume of NaOH to adjust the pH to7.4. After 1 h 30 min., the culture medium was then discarded and thecells were covered with a new layer of collagen (1.5 mg/ml, newpreparation, 50 μl/well). After polymerization of the gel, culturemedium was added to each well in presence or in absence of E3 antibody(DX-2200) or germlined E3 antibody (DX-2220) (0.1 ng/ml to 100 ng/ml).The total length of the tube network on the culture surface wasquantified at 40× magnification by the METAVUE™ Software (UniversalImaging Corporation). Results from triplicate wells were expressed asmean vessel area per field ±SEM (relative units). Each assay wasperformed at least three times. The conclusions are that conversion ofthe three somatic mutations to germline amino acids in E3 has had littleeffect on the potency of E3. Both parental E3 (FIGS. 2A and 2B) andgermlined E3 (FIGS. 2C and 2D) inhibit tube formation in vitro with anIC₅₀ less than 10 ng/ml, i.e. 66 pM.

Preliminary studies demonstrated that a monovalent Fab version ofDX-2240 Fab was unable to inhibit tube formation in HUVECs. Thus, inthis assay, bivalency is required to elicit an effect in a cell-basedassay.

Example 16 Analysis of Germlined Anti Tie1-E3 in Tube Formation Assayswith Mouse Endothelial Cells

In order to assess mouse Tie1 cross-reactivity and biological activityon mouse Tie1, both E3 and germlined E3 were evaluated for their abilityto inhibit tube formation in vitro using mouse endothelial cell line(LEII).

LEII lung mouse endothelial cell line (ATCC) was cultured in a T-25flask in MEM medium with GLUTAMAX™ (Life Technologies Ltd., Paisley,Scotland) supplemented with 10% FCS, and 1% penicillin/streptomycin.During culturing, the cells were kept in a proliferative state byculturing them in a split ratio 1:5 at an approximate density of themonolayer of about 80%. LEII monolayers were treated with trypsin/EDTA(500 μl/dish) at 37° C. for 3 min. Trypsin activity was stopped byadding 3 volumes of complete MEM medium. The cells were carefullyscraped, separated by repeated pipetting, and finally washed withPBS.LEII cells were seeded in their culture medium (20-40×103/50 μl/wellof a 96-well plate) on a basement membrane (BIOCOAT™ AngiogenesisSystem; Becton Dickinson). After polymerization of the MATRIGEL™ (30 minat 37° C., 5% CO₂ environment) the endothelial cell suspensionresuspended in complete culture medium in the presence of the desiredmolecules (4.105 cells/ml; 50 μl/well) was added to each well. Theangiogenesis assay plate was then incubated for 16 to 18 hours at 37°C., 5% CO₂ atmosphere. The total length of the tube network was thenquantified at 40× magnification by the METAVUE™ Software (UniversalImaging Corporation). Results from triplicate wells were expressed asmean vessel area per field ±SEM (relative units). Each assay wasperformed at least two times. Germlined E3 is a potent inhibitor of tubeformation in mouse endothelial cells.

Example 17 Immunohistochemical Analysis of Mouse Tumor Tissue SectionsUsing Anti Tie1-E3 IgG

We determined if antibody E3 binds to mouse endothelial cells in mousexenographs. Immunohistochemistry was performed with biotinylated E3 IgG1(a,z allotype) antibody and control antibodies anti-CD31 (endothelialcell specific marker) and anti-PCNA (proliferating cell nuclearantigen). Formalin-fixed tumor tissues from a mouse-xenograph containingSW480 cells (ATCC) were tested for the binding pattern of the humananti-Tie1 antibody E3. 5 μm sections of paraffin embedded tissues weredeparaffinized, rehydrated and pretreated with warm the citrate buffer(0.01 M sodium citrate, pH6 at 95° C.) for 45 min. The slides werecooled down in fresh citrate buffer for 20 min and rinsed with distilledwater. The slides were hydrogen peroxide treated, (0.3% H₂O₂ in PBS),and preincubated with PBS, 5% FCS, 5% heat inactivated human serum (HS)for 1 hour. Between antibody incubations slides were washed 3 times 5minutes in PBS. Biotinylated antibodies E3 and A2-SV were diluted to aconcentration of 10 μg/ml in PBS, 10% HS and incubated for 1 hour at RT.Slides were then incubated with an avidin-HRP (Dako) for 30 minutes atroom temperature. Staining was detected by AEC (Vector Laboratories,Burlingame) and H₂O₂. The peroxidase reaction was stopped with water andslides were counter-stained with haematoxylin. The tissues wereevaluated for their binding reactivity. The staining pattern wasconsistent with staining of mouse endothelial cell Tie1 and also withTie1 expressed by the E3 binds to Tie1 expressed by SW480 tumor cells ina mouse xenograft.

Example 18 E3 Activity in a MATRIGEL™ Plug Assay

The germlined variant of the E3 IgG antibody was evaluated in an in vivoassay for angiogenesis induced by bFGF in MATRIGEL™ plugs. Growth factorreduced MATRIGEL™ (BD Biosciences, catalog #354230) was supplementedwith 80 ng/ml of bFGF (R&D Systems, catalog #234-FSE). The A2-SV or anIgG4 E3 antibody (10 μg/ml) or PBS was injected subcutaneously into theabdominal area of NMRI nu/nu mice (150 μl of Matrigel/plug).

In the first assay, two mice were injected with MATRIGEL™ supplementedwith bFGF and soluble VEGFR-1 (10 μg/ml) as a positive control for anangiogenic inhibitor. At day 7 post-implantation mice were anesthetizedand perfused through heart with 4% paraformaldehyde (PFA) in phosphatebuffered saline (PBS). MATRIGEL™ plugs and a piece of liver were removedand embedded in paraffin. Sections were cut and stained with hematoxylinand eosin (H&E).

The staining revealed modification of MATRIGEL™ and formation ofvessel-like structures in the PBS and A2-SV antibody treated plugs. Eventhough the E3 antibody and soluble VEGFR1 supplemented plugs containedsingle cells, there were neither modification of the matrix nororganization of the cells observed in these plugs. This resultsindicates that the germlined E3 antibody inhibits angiogenesis inMATRIGEL™ in vivo.

In a second assay, mice were treated as described above, and thenanesthetized eight days post-implantation and injected withfluorescein-conjugated tomato (lycopersicon esculentum) lectin (100 μgin 200 μl of PBS; Vector, catalog #FL-1171) into the tail vein. Afterfive min circulation the animals were perfused through the heart with 10ml of PBS followed by 10 ml of 4% PFA in PBS. MATRIGEL™ plugs and piecesof kidney and liver were removed and frozen in OCT (Tissue-Tek). Nucleiwere visualized on sections by using VECTASHIELD® mounting mediumcontaining DAPI (Vector) and analyzed under fluorescence microscopy.

Staining of the MATRIGEL™ with fluorescein lectin revealedstain-positive material for the PBS and control antibody (A2-SV)containing plugs, but no staining could be detected in the E3 antibodycontaining plugs. As a control, the blood vessels of the kidney andliver from the same mice showed nice staining with the fluorescentlectin.

Results from these two experiments suggest that the anti-Tie1 antibodyE3 can inhibit bFGF-induced angiogenesis in vivo.

To assess further the potential anti-angiogenic activity of the E3antibody, a third assay examining the effect of DX-2210 (E3 antibodywith germlined light chain) on bFGF-induced endothelial cell tubeformation in MATRIGEL™ plugs was performed. Growth factor reducedMATRIGEL™ supplemented with HUVECs, bFGF, and DX-2210, A2-SV (negativecontrol IgG), or PBS were injected subcutaneously into the abdominalarea of Balb/c nu/nu mice (150 μl MATRIGEL™/plug). At day 8post-implantation, mice were anesthetized and injected withfluorescein-conjugated tomato (Lycopercicon esculentum) lectin into thetail vein. After a five minute circulation period, the MATRIGEL™ plugsand liver and kidneys were removed and frozen in OCT media. In order toquantitate the amount of blood vessels in the MATRIGEL™ plugs, sectionswere cut and either stained for endothelial cell content using ananti-CD-31 antibody or analyzed under fluorescence microscopy to assessthe amount of functional blood vessels (tomato lectin staining) (datanot shown). In addition, the amount of blood vessels per unit area wasquantitated. These results demonstrated that DX-2210 inhibitsbFGF-induced angiogenesis by 70% in the MATRIGEL™ assay (FIG. 3).

Example 19 Evaluating Effects of Ligands on Complex Formation

A candidate protein (for example, E3 or E3b antibody) that binds acomplex member, such as Tie1, Tie2, or an angiopoietin is tested for itsability to antagonize formation of a heteromeric complex that includesTie1, Tie2, and Ang, by inhibiting its formation or disrupting theheteromeric complex once it forms.

To test the ability of a candidate protein to disrupt complex formation,cells expressing Tie1 and Tie2 are treated with Ang for a period of timesufficient to allow binding of Ang to Tie1 and/or Tie2. The cells arecontacted with the candidate protein for a period of time sufficient toallow disruption of the complex. The cells are treated with a membranenon-permeable cross-linker, such as DTSSP, to chemically cross-link theproteins. Cell lysates are prepared and subjected to immunoprecipitationwith an antibody specific to a complex member. The immunoprecipitatedproteins are separated by SDS-PAGE electrophoresis and immunoblottedwith antibodies specific to the complex members. A positive controlimmunoprecipitation-immunoblot is also performed in which cellsexpressing Tie1 and Tie2 are treated with Ang but not with the candidateprotein or are treated with a nonspecific protein. If treatment with thecandidate protein decreases the amount of a complex member—that is notbound by the immunoprecipitating antibody-associated with theimmunoprecipitated member as compared to the positive control, thecandidate protein is an antagonist of complex formation.

To determine if a candidate protein inhibits complex formation, asimilar experiment is performed, except that the cells expressing Tie1and Tie2 are treated with the candidate protein prior to treatment ofthe cells with Ang. The cells are incubated for a period of timesufficient to allow complex formation in the absence of candidateprotein. As described above, a positive control in which the cells arenot treated with a candidate protein or are treated with a nonspecificprotein is performed. The treated cells are then lysed andimmunoprecipitations and immunoblots are performed as described above.

Candidate proteins that antagonize complex formation, by inhibitingcomplex formation or by disrupting complexes, are then tested for theireffects on angiogenesis in an assay described herein.

Example 20 Tie2 Amino Acid Sequence

An exemplary Tie2 amino acid sequence is as follows:

SWISS PROT ACCESSION NUMBER: Q02763 (SEQ ID NO: 162) MDSLASLVLCGVSLLLSGTV EGAMDLILIN SLPLVSDAET SLTCIASGWR 50 PHEPITIGRD FEALMNQHQDPLEVTQDVTR EWAKKVVWKR EKASKINGAY 100 FCEGRVRGEA IRIRTMKMRQ QASFLPATLTMTVDKGDNVN ISFKKVLIKE 150 EDAVIYKNGS FIHSVPRHEV PDILEVHLPH AQPQDAGVYSARYIGGNLFT 200 SAFTRLIVRR CEAQKWGPEC NHLCTACMNN GVCHEDTGEC ICPPGFMGRT250 CEKACELHTF GRTCKERCSG QEGCKSYVFC LPDPYGCSCA TGWKGLQCNE 300ACHPGFYGPD CKLRCSCNNG EMCDRFQGCL CSPGWQGLQC EREGIPRMTP 350 KIVDLPDHIEVNSGKFNPIC KASGWPLPTN EEMTLVKPDG TVLHPKDFNH 400 TDHFSVAIFT IHRILPPDSGVWVCSVNTVA GMVEKPFNIS VKVLPKPLNA 450 PNVIDTGHNF AVINISSEPY FGDGPIKSKKLLYKPVNHYE AWQHIQVTNE 500 IVTLNYLEPR TEYELCVQLV RRGEGGEGHP GPVRRFTTASIGLPPPRGLN 550 LLPKSQTTLN LTWQPIFPSS EDDFYVEVER RSVQKSDQQN IKVPGNLTSV600 LLNNLHPREQ YVVRARVNTK AQGEWSEDLT AWTLSDILPP QPENIKISNI 650THSSAVISWT ILDGYSISSI TIRYKVQGKN EDQHVDVKIK NATIIQYQLK 700 GLEPETAYQVDIFAENNIGS SNPAFSHELV TLPESQAPAD LGGGKMLLIA 750 ILGSAGMTCL TVLLAFLIILQLKRANVQRR MAQAFQNVRE EPAVQFNSGT 800 LALNRKVKNN PDPTIYPVLD WNDIKFQDVIGEGNFGQVLK ARIKKDGLRM 850 DAAIKRMKEY ASKDDHRDFA GELEVLCKLG HHPNIINLLGACEHRGYLYL 900 AIEYAPHGNL LDFLRKSRVL ETDPAFAIAN STASTLSSQQ LLHFAADVAR950 GMDYLSQKQF IHRDLAARNI LVGENYVAKI ADFGLSRGQE VYVKKTMGRL 1000PVRWMAIESL NYSVYTTNSD VWSYGVLLWE IVSLGGTPYC GMTCAELYEK 1050 LPQGYRLEKPLNCDDEVYDL MRQCWREKPY ERPSFAQILV SLNRMLEERK 1100 TYVNTTLYEK FTYAGIDCSAEEAA 1124

Example 21 Ang1 Amino Acid Sequence

An exemplary Ang1 amino acid sequence is as follows:

NCBI ACCESSION NUMBER: AAM92271; gi: 22203641 (SEQ ID NO: 163) 1MTVFLSFAFL AAILTHIGCS NQRRSPENSG RRYNRIQHGQ CAYTFILPEH DGNCRESTTD 61QYNTNALQRD APHVEPDFSS QKLQHLEHVM ENYTQWLQKL ENYIVENMKS EMAQIQQNAV 121QNHTATMLEI GTSLLSQTAE QTRKLTDVET QVLNQTSRLE IQLLENSLST YKLEKQLLQQ 181TNEILKIHEK NSLLEHKILE MEGKHKEELD TLKEEKENLQ GLVTRQTYII QELEKQLNRA 241TTNNSVLQKQ QLELMDTVHN LVNLCTKEVL LKGGKREEEK PFRDCADVYQ AGFNKSGIYT 301IYINNMPEPK KVFCNMDVNG GGWTVIQHRE DGSLDFQRGW KEYKMGFGNP SGEYWLGNEF 361IFAITSQRQY MLRIELMDWE GNRAYSQYDR FHIGNEKQNY RLYLKGHTGT AGKQSSLILH 421GADFSTKDAD NDNCMCKCAL MLTGGWWFDA CGPSNLNGMF YTAGQNHGKL NGIKWHYFKG 481PSYSLRSTTM MIRPLDF

Example 22 Conversion of a Mutation Positioned in the Framework 3 Regionof Anti-Tie1 E3 Heavy Chain to Germline Residue

In order to limit the risk of potential immunogenicity of the E3antibody after administration to patients, all non-germline mutations inframework regions were corrected back to germline amino acid residues.The anti-Tie1 E03 antibody was isolated from Dyax Fab 200 library. Inthis library, the HC framework regions are unique and correspond to theDP47 germline segment (V3-23). Since the construction of the syntheticHC-CDR1-CDR2 sublibrary was made through the assembling of overlappingoligonucleotides, followed by some PCR cycles, mutations may have beenintroduced by one of those 2 steps. Therefore, an analysis was performedwhich aligned the HC of E03 antibody with the DP47 germline genesequence. One non-germline mutation positioned in framework regionnumber 3 was identified where a methionine residue has been replaced bya valine residue.

A strategy was designed to repair this mutation. The introduction of thegermlined residue was facilitated by the presence of internalrestriction sites in the framework flanking regions of the CDRs. Indeed,the design of the HC-CDR1-CDR2 sublibrary, present in FAB 310 library,was made in such a way that the shuffling of every CDR is allowed by thepresence of unique restriction sites in the framework flanking regions.Since the valine residue to be corrected is located in FR3 region, 3′near the XbaI site, a primer was designed containing both the XbaIsequence and the corrected methionine germline residue. The changes wereintroduced by PCR using the Top XbaI -M forward primer combined with a3′ reverse primer (CJ-lift Nhe REV) annealing in the CHI region. A PCRfragment of ˜180 bp was then generated. The germlining PCR primers were:

Top XbaI-M primer: (SEQ ID NO: 717)5′ TTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCA GaTGAAC 3′ (SEQ ID NO:718)     F  T  I  S  R  D  N  S  K  N  T  L  Y  L Q  M  N CJ-lift NheREV: (SEQ ID NO: 719) 5′ GGAGGGTGCTAGCGGGAAGACCG 3′

Example 23 Cloning of Germlined Heavy Chain Tie1 E3

In order to determine if the germlined residue introduced into E3 heavychain had affected the biological activity of the antibody, a solubleFab expression vector containing the germlined E3 antibody (termed “E3b”or DX-2220) was constructed. The PCR fragment from Example 22 wasdigested overnight with 50 U/μg XbaI restriction enzyme, followed by a 5hours digestion with 25 U/μg BstEII. The cleaved PCR product was thenpurified on a 1% TAE-agarose preparative gel. Ligation into thesimilarly-digested phagemid expression vector (pMID1) containing theTie1 E3 germlined light chain sequence was performed for three hours atroom temperature. Five nanograms of the newly-ligated material wereelectroporated into TG1 bacterial cells. Verification of the correctionof the mutation was performed by sequence determination of the heavychain of 20 randomly picked isolates. The resulting coding constructcontained sequences that encode a germlined HC and a germlined LCsequence in a Fab format (termed Fab E3b).

Example 24 Production and Purification of E3b (DX-2220)

The E3b Fab antibody was reformatted to a human IgG1. This construct wasthen used to transiently transfect HEK293T cells. Plasmid preparationsfor transient cell transfections were obtained using the Qiagen filterPlasmid Maxi kit (Qiagen, cat. no. 12263). HEK293T cells (GenHunterCorp., cat. no. Q401) were seeded 24 hours before transfection; 220×10⁶cells were plated per CELLSTACK® culture vessel (CellSTACK®-10 Chamber,Corning, cat. no. 3271). Transfections were carried out using theGeneJuice® reagent (VWR, cat. no. novg70967-3) following themanufacturer's instructions. 650 micrograms of plasmid DNA was used perCELLSTACK®. Cells were cultured in DMEM (Invitrogen, cat. no. 31966021)supplemented with 10% “ultra-low IgG” fetal calf serum (Invitrogen, cat.no. 16250078), at 37° C., 5% CO₂, in a water saturated atmosphere.Conditioned media were harvested 72, 144 and 216 hours aftertransfection, pooled and sterile filtered.

Cell culture supernatants were loaded on a 25-ml rProteinA FF column (GEHealthcare, cat. no. 17-1279-02) equilibrated against PBS containing 0.5M NaCl. The column was washed with PBS containing 0.5 M NaCl, then with0.1 M sodium acetate pH 5.0 to remove bovine IgGs and the antibody waseluted with 12.5 mM citric acid. Fractions (5 ml) containing theantibody were neutralized by addition of 150 μl of 1 M Tris-HCl, pH 9.0.

The E3b antibody was further purified by cation exchange. The antibodywas dialyzed against 50 mM sodium citrate, pH 5.0, and loaded on aHiLoad 26/10 SP Sepharose HP column (GE Healthcare, cat. no. 17-1138-01)equilibrated in the same buffer. The antibody was eluted with 50 mMsodium citrate, pH 5.0, containing 1 M NaCl (linear gradient on 10column volumes). Fractions containing the antibody were pooled anddialyzed against PBS. Antibody concentration was calculated from theabsorbance at 280 nm, assuming that a protein concentration of 1 mg/mlhas an absorbance of 1.36.

Example 25 Testing of E3b-IgG1 Binding to TIE-1/Fc in BIAcore

The germlined E3b IgG1 stock solution (0.56 mg/ml) and the parental E3IgG1 stock solution (0.41 mg/ml) were diluted 50-fold in 10 mM sodiumacetate, pH 4.5. The IgGs were directly coated on a CM5 chip. Thesurface of the chip was activated with a 7-minute pulse of 0.05 MNHS/0.2 M EDC and the IgG was run over the chip until 823 RU ofgermlined E3b and 788 RU of parental E3 were coated on the surface. Allflow cells were subsequently deactivated with a 7-minute pulse of 1 Methanolamine hydrochloride, pH 8.5. All further experiments wereperformed in HBS buffer.

Purified recombinant human Tie1/Fc was diluted in HBS to finalconcentrations of 200, 100, 50, 25 and 12.5 nM. Samples were injected at30 μl/min for 8.3 minutes using the kinject program. This was followedby a 50-minute dissociation phase. Any remaining antigen was strippedfrom the surface with two 30-sec injections of 10 mM glycine, pH 1.5.

The sensorgrams obtained with this approach are shown below. Visualanalysis shows that the dissociation (k_(off)) is extremely slow (only avery small fraction of Tie1/Fc dissociated despite the long dissociationtime), which suggests a very tight interaction. Interestingly, thedissociation rates for the IgGs as measured here are much slower thatthose of the corresponding Fabs (see Example 29 below), indicating thatthere is a significant increase in the affinity when going from themonovalent Fab to the bivalent IgG (avidity).

Example 26 Testing of E3b—Fab Binding to Tie1/Fc in BIAcore

To evaluate if the binding behaviour had been affected in any way by theconversion of the somatic mutations back to germline residues, theparental and the germlined E3b antibodies were produced and tested inBiacore as Fab fragments. Here, by contrast to what was done for theIgGs (see Example 28), and in order to measure a monovalent interaction,the Fabs were run over the antigen directly coated onto the surface.

Recombinant human Tie1/Fc was coated on a CM5 chip. The surface of thechip was first activated with a 7-minute pulse of 0.05 M NHS/0.2 M EDC,then Tie1/Fc (2 μg/ml in 10 mM sodium acetate, pH 4.0) was run over thechip surface until 750 RUs were coated on the surface. All flow cellswere subsequently deactivated with a 7-minute pulse of 1 M ethanolaminehydrochloride, pH 8.5. All further experiments were performed in HBSbuffer.

The parental and the germlined E3b Fabs were prepared. A series ofdilution (50, 25, 12.5, 6.25 and 3.125 nM) was prepared in HBS buffer.Samples were injected at 30 μl/min for 5.3 minutes using the KINJECT™program. This was followed by a 10-minute dissociation phase, and theremaining Fab was stripped from the surface with a single 18-secinjection of 50 mM NaOH/1 M NaCl.

Sensorgrams were analyzed using the simultaneous ka/kd fitting programfrom the BIAEVALUATION™ software 3.1 assuming a 1:1 model. This analysisproved that the germlining of the E3 antibody has little or no effect onthe affinity against Tie1/Fc:

E3 Fab Tie1 Fc kon (1/Ms) koff (1/s) KD (nM) Parental Human 8.81e41.05e−03 12 germlined Human 1.36e5 1.01e−03 7 (E3b)

Example 27 Testing of E3b—IgG for Biological Activity in Tube FormationAssays

The purpose of this study was to determine if the correction of HCmutation back to germline in the parental E3 has any effect on thebiological activity. Human umbilical vein endothelial cells (HUVEC)(freshly isolated) were obtained by treating human umbilical cord veinswith Trypsin-EDTA (1×) (Gibco/Invitrogen) for 20-25 minutes at 37° C.The cells were then cultured in a T-25 flask coated with attachmentfactor (AF), (Cascade Biologics) in RPMI 1640 medium supplemented with10% FCS, 0.4% BBE, 1% 1-glutamin, 1% penicillin/streptomycin. Primarycultures were detached with warm Trypsin-EDTA and used when confluent atthe second or third passage. During culturing, the cells were kept in aproliferative state by culturing them in a split ratio 1:2 at anapproximate density of the monolayer of about 60-80%. HUVEC monolayerswere treated with trypsin/EDTA (500 μl/dish) at 37° C. for 3 min.Trypsin activity was stopped by adding 3 volumes of complete RPMImedium. The cells were carefully scraped, separated by repeatedpipetting, and finally washed with PBS. HUVECs (passage 3) were seededin their culture medium (40×10³/50 μl/well of a 96-well plate) on acollagen gel (50 μl of collagen I 1.5 mg/ml) prepared by mixing 7.5volumes of 2 mg/ml collagen (Collagen R; Serva, Heidelberg, Germany), 1volume of 10× MEM, 1.5 volume of NaHCO₃ (15.6 mg/ml) and ˜1 volume ofNaOH to adjust the pH to 7.4. After 1 h 30 min, the culture medium wasthen discarded and the cells were covered with a new layer of collagen(1.5 mg/ml, new preparation, 50 μl/well). After polymerization of thegel, culture medium was added to each well in presence or in absence ofE3b-IgG1 or parental E3 antibody (1 pg/ml to 10 ng/ml). Endothelial tubeformation was assessed with an inverted photomicroscope.Microphotographs of the centre of each well at low power (×40) weretaken with a Nikon camera with the aid of imaging-capture software. Tubeformation in the microphotographs was quantitatively analysed (totaltube length) with METAVUE® software (data not shown). Tube formation byuntreated HUVECs in full endothelial cell growth medium was used ascontrol. Results from triplicate wells were expressed as mean vesselarea per field ±SEM (relative units) (FIG. 4). The conclusions are thatE3b-IgG1 inhibits tube formation. Correction of HC mutation had nosignificant effect on biological activity.

Example 28 Exemplary Tie1 Binding Sequences

The following are exemplary sequences of immunoglobulin light chain andheavy chain variable domains:

1. 806C-M0044-A06 L-Variable (AA): (SEQ ID NO: 164)QSELTQPPSASGTPGQRVTISCSGSSSSIGLNPVNWYQQLPGTAPKVVIHSNDQRPSGVPDRFSGSKSGTSASLAISGLQSEDEADYYCAAWDDSLNGPAFGGGTKLTVL L-Variable (DNA):(SEQ ID NO: 165)CAGAGCGAATTGACTCAGCCACCCTCAGCGTCTGGGACCCCCGGGCAGAGGGTCACCATCTCTTGTTCTGGAAGCAGCTCCAGCATCGGACTTAATCCTGTAAACTGGTACCAGCAGCTCCCAGGAACGGCCCCCAAAGTAGTCATCCATAGTAATGATCAGCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAAGTCTGGCACCTCAGCCTCCCTGGCCATCAGTGGACTCCAGTCTGAGGATGAGGCTGATTATTACTGTGCAGCATGGGATGACAGCCTGAATGGTCCGGCATTCGGCGGAGGGACCAAGCTGACCGTCCTAG H-Variable (AA): (SEQ ID NO: 166)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYVMMWVRQAPGKGLEWVSRIYPSGGITQYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDVYRAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 167)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACGTTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCATTACTCAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGATGTCTACAGGGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 2. 806C-M0044-A11 L-Variable (AA): (SEQ IDNO: 168)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSPPGGTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 169)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACCTCCGGGGGGAACGTTCGGCCAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ ID NO: 170)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMHWVRQAPGKGLEWVSSIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDSHHFHFWGDYYFLEYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 171)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTATATTACTGTGCGAGAGATAGCCATCATTTCCATTTTTGGGGTGACTATTATTTTCTAGAATACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 3. 806C-M0044-B04L-Variable (AA): (SEQ ID NO: 172)QDIQMTQSPSSLSASVGDRVTITCRASQSISSYLNWYQQKPGKAPKLLIYAASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYSTPPTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 173)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATGCTGCATCCAGTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACAGTACCCCTCCCACTTTCGGCGGAGGGACCAAGGTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 174)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYLMFWVRQAPGKGLEWVSYIYPSGGWTMYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQNYYDSSGYYYRGFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 175)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACCTTATGTTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTATATCTATCCTTCTGGTGGCTGGACTATGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGGCAAAATTACTATGATAGTAGTGGTTATTACTATCGTGGCTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 4. 806C-M0044-B05L-Variable (AA): (SEQ ID NO: 176)DIHMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPPGITFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 177)GACATCCATATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCCGGGGATCACTTTCGGCGGAGGGACCAAGGTGGAGATCA AAH-Variable (AA): (SEQ ID NO: 178)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMGWVRQAPGKGLEWVSSIYPSGGWTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVLLHYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 179)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACTGCAGTCTACTATTGTGCAAGAGTACTACTACACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 5. 806C-M0044-B08 L-Variable (AA): (SEQID NO: 180)QDIQMTQSPSFLSASVGDRVTISCRASQYISIYLNWYQQRPGEAPKLLINAASSLQSGDPSRFSGSGSGTDFTLTINSLQPDDFATYYCQQYKSYPLTFGEGTKVEIK L-Variable (DNA): (SEQ IDNO: 181)CAAGACATCCAGATGACCCAGTCTCCATCCTTCCTGTCCGCATCTGTAGGAGACAGAGTCACCATCTCTTGCCGGGCAAGTCAGTACATCAGCATATATTTGAATTGGTATCAGCAGAGACCAGGGGAAGCCCCTAAACTCCTGATCAATGCTGCATCCAGTTTGCAAAGTGGGGACCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAACAGCCTGCAGCCTGATGATTTTGCAACTTATTACTGCCAACAGTATAAGAGTTACCCCCTCACTTTCGGCGAGGGGACCAAGGTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 182)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYGMGWVRQAPGKGLEWVSVISPSGGQTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTALYYCAGGDRYGPLHYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 183)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACGGTATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCAGACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCTTGTATTACTGTGCGGGAGGGGACAGGTATGGACCCTTGCACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 6. 806C-M0044-B09 L-Variable (AA): (SEQ IDNO: 184)QDIQMTQSPSSLSASVGDRVTITCQASQDISNYLNWYQQKPGKAPKLLIYHASNLETGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCLQYKSYPRLFGQGTKVEVK L-Variable (DNA): (SEQ IDNO: 185)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCAGGCGAGTCAGGACATTAGCAACTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTACCATGCATCCAATTTGGAAACAGGGGTCCCATCAAGGTTCAGTGGAAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTATTACTGTCTTCAGTATAAAAGTTACCCTCGATTGTTCGGCCAAGGGACCAAGGTGGAAGTCAAAH-Variable (AA): (SEQ ID NO: 186)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMNWVRQAPGKGLEWVSVIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCASGYYDSSGYSRFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 187)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCTGTGTATTACTGTGCGAGTGGTTACTATGATAGTAGTGGTTACTCCCGATTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 7. 806C-M0044-B10 L-Variable(AA): (SEQ ID NO: 188)QSALTQPASVSGSPGQSITISCTGTSSDVGSYNLVSWYQQHPGKAPQLMIYEGSKRPSGLSNRFSGSKSDNTASLTISGLQAEDEADYYCCSYAGSSTLVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 189)CAGAGCGCTTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGATGTTGGGAGTTATAACCTTGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCCAACTCATGATTTATGAGGGCAGTAAGCGGCCCTCAGGACTTTCTAATCGCTTCTCTGGCTCCAAGTCTGACAACACGGCCTCCCTGACAATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCTGCTCATATGCAGGTAGTAGCACTTTAGTATTCGGCGGAGGGACCAAGCTGACCG TCCTAH-Variable (AA): (SEQ ID NO: 190)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMGWVRQAPGKGLEWVSSIYPSGGPTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARSEVGAPDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 191)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCATGTATTACTGTGCGAGAAGCGAAGTGGGAGCCCCCGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 8. 806C-M0044-B12 L-Variable (AA): (SEQ IDNO: 192)QDIQMTQSPSTLSASVGDTVTMTCRASQSISGWLAWYQQKPGKAPNLLIFKASTLKSGVPSRFRGSGSGTEFTLTISSLQPDDFATYYCQQYNSYSQTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 193)CAAGACATCCAGATGACCCAGTCTCCTTCCACCCTTTCTGCATCTGTAGGAGACACCGTCACCATGACTTGCCGGGCCAGTCAGAGTATTAGTGGGTGGTTGGCCTGGTATCAGCAGAAACCAGGGAAAGCCCCTAACCTCCTGATCTTTAAGGCGTCTACTTTAAAAAGTGGGGTCCCGTCAAGGTTTCGCGGCAGTGGATCTGGGACAGAATTCACTCTCACCATCAGCAGCCTGCAGCCTGATGATTTTGCAACTTATTACTGCCAACAATATAATAGTTATTCTCAGACGTTCGGCCAAGGGACCAAGGTGGAAATCAAAH-Variable (AA): (SEQ ID NO: 194)EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYKMHWVRQAPGKGLEWVSSIYPSGGYTVYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCATDRWSSGGYGVDFWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 195)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATGTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTATACTGTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCCACAGACCGGTGGAGCAGTGGCGGGTACGGTGTTGACTTCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 9.806C-M0044-C07 L-Variable (AA): (SEQ ID NO: 196)QDIQMTQSPLSLPVTPGEPASISCRSSQSLLHSNGYNYLDWYLQKPGQSPQLLIYLGSNRASGVPDRFSGSGSGTDFTLKISRVEAEDVGVYYCMQALQTPQFGQGTKVEIK L-Variable (DNA): (SEQID NO: 197)CAAGACATCCAGATGACCCAGTCTCCACTCTCCCTGCCCGTCACCCCTGGAGAGCCGGCCTCCATCTCCTGCAGGTCTAGTCAGAGCCTCCTGCATAGTAATGGATACAACTATTTGGATTGGTACCTGCAGAAGCCAGGGCAGTCTCCACAGCTCCTGATCTATTTGGGTTCTAATCGGGCCTCCGGGGTCCCTGACAGGTTCAGTGGCAGTGGATCAGGCACAGATTTTACACTGAAAATCAGCAGAGTGGAGGCTGAGGATGTTGGGGTTTATTACTGCATGCAAGCTCTACAAACTCCTCAGTTCGGCCAAGGGACCAAGGTGGAAATCAAG H-Variable (AA): (SEQ ID NO: 198)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYDMSWVRQAPGKGLEWVSYIYPSGGPTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGDWASRFATWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 199)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACGATATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTATATCTATCCTTCTGGTGGCCCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGGCGATTGGGCTTCTCGTTTTGCCACCTGGGGCCAGGGGACCACGGTCACCGTCTCAAGC 10. 806C-M0044-D01 L-Variable (AA): (SEQID NO: 200)QYELTQPPSVSVAPGQTARITCGGNNIGIKSVNWYQQKPGQAPVLVVYDDSGRPSGIPQRFSGSNSGNTATLTINRVEAGDEADYYCQVWDSGSDHWVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 201)CAGTACGAATTGACTCAGCCACCCTCGGTGTCAGTGGCCCCAGGACAGACGGCCAGGATTACCTGTGGGGGAAACAACATTGGAATTAAAAGTGTGAACTGGTACCAGCAGAAGCCAGGCCAGGCCCCTGTGCTGGTCGTCTATGATGATAGTGGCCGGCCCTCAGGGATCCCTCAGCGATTCTCTGGCTCCAACTCTGGGAACACGGCCACCCTGACCATCAACAGGGTCGAAGCCGGGGATGAGGCCGACTATTACTGTCAGGTGTGGGATAGTGGTAGTGATCATTGGGTGTTCGGCGGAGGGACCAAGCTGACCGTCCTA H-Variable (AA): (SEQ IDNO: 202)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYKMGWVRQAPGKGLEWVSSIYPSGGFTRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARNFVESSHYYHDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 203)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACAAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTTTACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCCAGAAATTTCGTTGAAAGTAGTCATTATTACCATGACTATTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 11. 806C-M0044-E03 L-Variable(AA): (SEQ ID NO: 204)QSELTQPPSVSVAPGQTAVITCGGSNIGGKSVHWYQQKSGQAPVLVVFDDRDRPSGIPERFSGSNSGNTATLTITRVEVGDEADYYCQVWDSGTDHRVFGGGTRLTAL L-Variable (DNA): (SEQ IDNO: 205)CAGAGCGAATTGACTCAGCCACCCTCGGTGTCAGTGGCCCCAGGGCAGACGGCCGTGATTACCTGTGGGGGGAGCAACATTGGAGGTAAAAGTGTACACTGGTACCAGCAGAAGTCAGGCCAGGCCCCTGTGCTGGTCGTCTTTGATGATCGCGACCGGCCCTCAGGGATCCCTGAGCGATTCTCTGGCTCCAACTCCGGGAACACGGCCACCCTGACCATCACCAGGGTCGAAGTCGGGGATGAGGCCGACTATTACTGTCAGGTGTGGGATAGTGGAACTGATCATCGGGTGTTCGGCGGAGGGACCAGGCTGACCGCCCTAH-Variable (AA): (SEQ ID NO: 206)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMFWVRQAPGKGLEWVSGIYPSGGHTRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARRGSGGYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 207)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGTTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCCATACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACGAGGCTCGGGGGGCTACTTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 12.806C-M0044-F03 L-Variable (AA): (SEQ ID NO: 208)QSALTQDPAVSVALGQTVRITCRGDRLRSYYSSWYQQKPRQAPVLVMFGRNNRPSGIPDRFSGSTSGSTASLTITATQADDEADYFCSSRDGSGNFLFGGGTKLTVL L-Variable (DNA): (SEQ ID NO:209) CAGAGCGCTTTGACTCAGGACCCTGCTGTGTCTGTGGCCTTGGGGCAGACAGTCAGGATCACATGCCGAGGAGACAGACTCAGAAGTTATTATTCAAGTTGGTACCAGCAGAAGCCACGACAGGCCCCTGTTCTTGTCATGTTTGGTAGAAACAACCGGCCCTCAGGGATCCCAGACCGATTCTCTGGCTCCACCTCAGGAAGCACAGCTTCCTTGACCATCACTGCGACTCAGGCGGACGATGAGGCTGACTATTTCTGTAGTTCCCGGGACGGCAGTGGTAATTTCCTCTTCGGCGGAGGGACCAAACTGACCGTCCTT H-Variable(AA): (SEQ ID NO: 210)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMIWVRQAPGKGLEWVSSIYPSGGTTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARSDLGSGWYSAEYFQHWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 211)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCACTACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCTGTGTATTACTGTGCGAGAAGCGACCTAGGCAGTGGCTGGTATAGCGCTGAATACTTCCAGCACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 13. 806C-M0044-F06L-Variable (AA): (SEQ ID NO: 212)QDIQMTQSPGTLSLSPGERATLSCRASQSVSGNLLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTITRLEPEDFAVYFCQQYGGSPPVTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 213)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCGGCAACCTCTTAGCCTGGTATCAGCAGAAACCTGGCCAGGCTCCCAGACTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCACCAGACTGGAGCCTGAAGATTTTGCAGTGTATTTCTGTCAGCAGTATGGTGGCTCACCTCCGGTCACT TTCGGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA):(SEQ ID NO: 214)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYLMIWVRQAPGKGLEWVSRIYPSGGGTEYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVTYYYDSSGYQPAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 215)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACCTTATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCGGTACTGAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTCACGTATTACTATGATAGTAGTGGTTATCAACCCGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 14. 806C-M0044-F09L-Variable (AA): (SEQ ID NO: 216)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLIISSLEPEDFAVYYCQQRSNWPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 217)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCATCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTATTGTCAGCAGCGTAGCAACTGGCCTCGAACGTTCGGCCAAGGGACCAAGGTGGAAATCAAAH-Variable (AA): (SEQ ID NO: 218)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYGMTWVRQAPGKGLEWVSVIGPSGGNTMYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVWGAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 219)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACGGTATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCGGTCCTTCTGGTGGCAATACTATGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTATGGGGTGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 15. 806C-M0044-G06 L-Variable (AA): (SEQ ID NO:220) QDIQMTQSPATLSVSPGERATLSCRASQSVYNNLAWYQQKPGQAPRLLIYDASTTATGIPARFSGSGSGTDFTLTITSLEPEDFAVYYCQQRSNWPSLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 221)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAACGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTTACAACAACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCACCACGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCACCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCCTCGCTCACTTTC GGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQID NO: 222)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMGWVRQAPGKGLEWVSSIYPSGGWTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVLLHYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 223)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACTGCAGTCTACTATTGTGCAAGAGTACTACTACACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 16. 806C-M0044-G07 L-Variable (AA): (SEQ IDNO: 224)QDIQMTQSPSFLSASLGDRVTITCRATQGIGTFLAWYQQKAGRAPKLLIYGASTLQSGVPSRFSGSGSGTEFTLTISSLQPEDFATYYCQQPNSFFGQGTKLEIK L-Variable (DNA): (SEQ ID NO:225) CAAGACATCCAGATGACCCAGTCTCCATCCTTCCTGTCTGCATCTTTAGGAGACAGAGTCACCATCACTTGTCGGGCCACTCAGGGCATCGGCACTTTTTTAGCCTGGTATCAGCAAAAAGCAGGGAGAGCCCCTAAACTCCTGATCTATGGTGCTTCCACTTTGCAGAGTGGGGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGGACAGAATTCACTCTCACAATAAGCAGCCTGCAGCCTGAAGATTTTGCAACTTATTACTGTCAACAGCCTAATAGTTTTTTTGGGCAGGGGACCAAGCTGGAGATCAAA H-Variable (AA):(SEQ ID NO: 226)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMGWVRQAPGKGLEWVSSIYPSGGWTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVLLHYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 227)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACTGCAGTCTACTATTGTGCAAGAGTACTA CTACACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC17. 806C-M0044-G11 L-Variable (AA): (SEQ ID NO: 228)QDIQMTQSPSSVSASVGDRVTITCRASQDISSWLVWYQQKPGKAPKLLIHDASNLQSGVPSRFSGSGSGTDFTLTINSLQPEDFATYYCQQANSFPVTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 229)CAAGACATCCAGATGACCCAGTCTCCATCTTCCGTGTCTGCATCTGTAGGAGACAGAGTCACCATTACTTGTCGGGCGAGTCAGGATATTAGCAGTTGGTTAGTCTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCCATGATGCATCCAATTTGCAAAGTGGGGTCCCATCAAGGTTCAGCGGCAGTGGGTCTGGGACAGATTTTACTCTCACCATCAACAGCCTGCAGCCTGAAGATTTTGCAACTTACTATTGTCAACAGGCTAACAGTTTCCCGGTCACTTTCGGCGGAGGGACCAAGGTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 230)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYPMLWVRQAPGKGLEWVSSISPSGGATAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKGSYSDYGVFESWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 231)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACCCTATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTCTCCTTCTGGTGGCGCTACTGCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAAGGCTCATACAGTGATTACGGGGTCTTTGAGTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 18.806C-M0044-H03 L-Variable (AA): (SEQ ID NO: 232)QRVLTQPPSASGTPGQRVTISCSGSSSNVGSNNVNWYQQLPGQAPKLLIDSNNHRPSGVPDRFSGSKSGTSASLALSGLQSEDEADYYCATWDDNLIAPVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 233)CAGAGGGTCTTGACTCAGCCACCCTCAGCGTCTGGGACCCCCGGGCAGAGGGTCACCATCTCCTGTTCTGGAAGCAGCTCCAATGTCGGAAGTAATAATGTAAACTGGTATCAGCAGCTCCCAGGACAGGCCCCCAAACTCCTCATCGATAGTAATAATCACCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAAGTCTGGCACCTCAGCCTCCCTGGCCCTCAGTGGGCTCCAGTCTGAGGATGAGGCTGATTATTATTGTGCGACATGGGACGACAACCTGATTGCCCCGGTATTCGGCGGAGGGACCAAGCTGACCG TCCTAH-Variable (AA): (SEQ ID NO: 234)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYRMSWVRQAPGKGLEWVSGIVPSGGWTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDNYYDFWSGYYISRFGMDVWGQGTTVTVSSH-Variable (DNA): (SEQ ID NO: 235)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCGTATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCGTTCCTTCTGGTGGCTGGACTACTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACTGCAGTCTACTATTGTGCGAGAGATAACTATTACGATTTTTGGAGTGGTTATTATATTTCTCGATTCGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 19.806C-M0044-H05 L-Variable (AA): (SEQ ID NO: 236)QYELTQPASVSGSPGQSITISCTGSSSDVSGYNYVSWYQHHPGKAPKLMLYDVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSSSTWVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 237)CAGTACGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGATCCAGCAGTGACGTTAGTGGTTATAACTATGTCTCCTGGTACCAACACCACCCAGGCAAAGCCCCCAAACTCATGCTTTATGATGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATACAAGCAGCAGCACTTGGGTGTTCGGCGGAGGGACCAAGCTGACCG TCCTAH-Variable (AA): (SEQ ID NO: 238)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYMMFWVRQAPGKGLEWVSRIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVTVPLDSGSYYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 239)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACATGATGTTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTTACGGTACCCCTTGATAGTGGGAGCTACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 20. 806C-M0044-H07L-Variable (AA): (SEQ ID NO: 240)QDIQMTQSPSSLSASVGDRVTITCRASQGIRNDLGWYQQKPGKAPKLLIYAASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCLQDYNYPWTFGQGTNVEIK L-Variable (DNA): (SEQ IDNO: 241)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGGGCATTAGAAATGATTTAGGCTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATGCTGCATCCAGTTTACAAAGTGGGGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGCACAGATTTCACTCTCACCATCAGCAGCCTGCAGCCTGAAGATTTTGCAACTTATTACTGTCTACAAGATTACAATTACCCGTGGACGTTCGGC CAAGGGACCAATGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 242)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYLMTWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCAREMYYDFWSGYYRGFDIWGQGTTVTVSS H-Variable(DNA): (SEQ ID NO: 243)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACCTTATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACATATTACTGTGCGAGAGAGATGTATTACGATTTTTGGAGTGGTTATTATCGAGGTTTTGATATCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 21. 806C-M0044-H09L-Variable (AA): (SEQ ID NO: 244)QDIQMTQSPSTLSASIGDRVTITCRASQRVSTWVAWYQQKPGRAPKLLIYMASRLESGVPSRFSGSGSGTEFTLTISSLQPDDFATYWCQQYNFYPRTFGQGTKVDIK L-Variable (DNA): (SEQ IDNO: 245)CAAGACATCCAGATGACCCAGTCTCCTTCCACCCTGTCTGCATCTATAGGAGACAGAGTCACCATCACTTGCCGGGCCAGTCAGCGTGTTAGTACTTGGGTGGCCTGGTATCAGCAGAAACCAGGGAGAGCCCCAAAACTCTTGATCTATATGGCGTCTAGGTTAGAAAGTGGGGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGGACAGAGTTCACTCTCACCATAAGCAGCCTGCAGCCTGATGATTTTGCTACTTATTGGTGCCAACAATATAATTTTTATCCTCGGACGTTCGGCCAAGGGACCAAGGTGGACATCAAAH-Variable (AA): (SEQ ID NO: 246)EVQLLESGGGLVQPGGSLRLSCAASGFTFSWYGMNWVRQAPGKGLEWVSSISPSGGQTPYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDLGGAYIPDSWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 247)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTGGTACGGTATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTCTCCTTCTGGTGGCCAGACTCCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGCGAGATCTCGGTGGGGCCTACATACCTGACTCCTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 22.806C-M0045-A02 L-Variable (AA): (SEQ ID NO: 248)QDIQMTQSPSFLSASVGDRVTITCRASQGISNYLAWYQQEPGKAPKLLIYSASTLQTGVPSRFSGSGSGTEFTLTISSLQPEDFATYYCQQFNSYPRTFGHGTKVEFK L-Variable (DNA): (SEQ IDNO: 249)CAAGACATCCAGATGACCCAGTCTCCTTCCTTCCTGTCTGCATCTGTGGGAGACAGAGTCACCATCACTTGCCGGGCCAGTCAGGGCATTAGCAATTATTTAGCCTGGTATCAGCAAGAACCAGGGAAAGCCCCTAAGCTCCTCATCTATTCTGCGTCCACTTTGCAAACTGGAGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGGACAGAGTTCACTCTCACAATCAGCAGCCTGCAGCCTGAGGATTTTGCAACTTATTACTGTCAACAGTTTAACAGTTACCCTCGAACGTTCGGCCACGGGACCAAGGTGGAATTCAAAH-Variable (AA): (SEQ ID NO: 250)EVQLLESGGGLVQPGGSLRLSCAASGFTFSTYPMMWVRQAPGKGLEWVSVISPSGGQTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCTRGGRLNAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 251)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTACTTACCCTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCAGACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCGTGTATTACTGTACGAGAGGGGGGAGGCTGAATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 23. 806C-M0045-A04 L-Variable (AA): (SEQID NO: 252)QSALTQDPAVSVALGQTVRFTCQGDSLRNYHPSWYQQKPGQAPVLVIYGKNNRPSGIPDRFSGSSSGNTASLTITGAQAEDEADYYCNSRDSSGNHVFGTGTKVTVL L-Variable (DNA): (SEQ ID NO:253) CAGAGCGCTTTGACTCAGGACCCTGCTGTGTCTGTGGCCTTGGGACAGACAGTCAGGTTCACTTGCCAAGGAGACAGCCTCAGAAATTATCATCCAAGCTGGTACCAGCAGAAGCCAGGACAGGCCCCTGTACTTGTCATCTATGGTAAAAACAACCGGCCCTCAGGGATCCCAGACCGATTCTCTGGCTCCAGCTCAGGAAACACAGCTTCCTTGACCATCACTGGGGCTCAGGCGGAAGATGAGGCTGACTATTACTGTAACTCCCGGGACAGCAGTGGTAACCATGTCTTCGGAACTGGGACCAAGGTCACCGTCCTA H-Variable(AA): (SEQ ID NO: 254)EVQLLESGGGLVQPGGSLRLSCAASGFTFSIYQMGWVRQAPGKGLEWVSRIYPSGGVTKYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDFGPGDLWSGYYDAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 255)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATTTACCAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCGTTACTAAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCTGTGTATTACTGTGCCAGAGATTTCGGTCCGGGCGATTTATGGAGTGGTTATTATGATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 24. 806C-M0045-B01L-Variable (AA): (SEQ ID NO: 256)QSALTQPASASGSPGQSVTISCTGTSSDVGGYNYVSWYQQHPGKAPKLMIYEVSKRPSGVPDRFSGSKSATTASLTVSGLQAEDEADYYCSSYAGSNNLIFGGGTKVTVL L-Variable (DNA): (SEQ IDNO: 257)CAGAGCGCTTTGACTCAGCCTGCCTCCGCGTCCGGGTCTCCTGGACAGTCAGTCACCATCTCCTGCACTGGAACCAGCAGTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGTCAGTAAGCGGCCCTCAGGGGTCCCTGATCGCTTCTCTGGCTCCAAGTCTGCCACCACGGCCTCCCTGACCGTCTCTGGGCTCCAGGCTGAGGATGAGGCTGATTATTACTGCAGCTCATATGCAGGCAGCAACAATTTGATATTCGGCGGGGGGACCAAGGTGACCGTCCTA H-Variable (AA): (SEQID NO: 258)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYQMQWVRQAPGKGLEWVSVIYPGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARLQFYGSSAAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 259)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACCAGATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGACTCCAGTTCTACGGTTCCTCTGCTGCTTTTGACATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 25. 806C-M0045-B03 L-Variable (AA):(SEQ ID NO: 260)QDIQMTQSPDTLSLSPGERATLSCRASQSISRYLAWYQQRPGQAPSLLIYDASERAAGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRGNWPLTFGGGTKVDIR L-Variable (DNA): (SEQ IDNO: 261)CAAGACATCCAGATGACCCAGTCTCCAGACACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTATTAGTAGATACTTAGCCTGGTACCAACAAAGACCTGGCCAGGCTCCCAGCCTCCTCATCTATGATGCATCCGAAAGGGCCGCTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTGGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAACGTGGCAACTGGCCGCTCACTTTCGGC GGAGGGACCAAGGTGGACATCAGA H-Variable (AA): (SEQ IDNO: 262)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYPMIWVRQAPGKGLEWVSVISPSGGHTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARIQYYGGAFDIWGQGKMVTVSS H-Variable (DNA):(SEQ ID NO: 263)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACCCTATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCATACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAATCCAGTACTACGGTGGGGCTTTTGATATCTGGGGCCAAGGGAAAATGGTCACCGTCTCAAGC 26. 806C-M0045-B11 L-Variable (AA):(SEQ ID NO: 264)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPHTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 265)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCACACTTTCGGCGGAGGGACCAAGGTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 266)EVQLLESGGGLVQPGGSLRLSCAASGFTFSPYGMLWVRQAPGKGLEWVSVISPSGGQTFYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARLGAEKGMDVWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 267)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCCTTACGGTATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCAGACTTTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGGCTAGGTGCGGAAAAAGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 27. 806C-M0045-C02 L-Variable (AA): (SEQID NO: 268)QDIQMTQSPATLSVSPGERATLSCRASQSVSSNLAWYQQRPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 269)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAACTTAGCCTGGTACCAGCAGAGACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACCTCGGACGTTCGGCCAAGGGACCAAGGTGGAAATCAAAH-Variable (AA): (SEQ ID NO: 270)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMGWVRQAPGKGLEWVSSIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKDSPHCSGGSCYGGYYYYGMDVWGQGTTVTVSSH-Variable (DNA): (SEQ ID NO: 271)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAAGATTCCCCGCATTGTAGTGGTGGTAGCTGCTACGGGGGCTACTACTACTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 28. 806C-M0045-C11 L-Variable (AA): (SEQ IDNO: 272)QSELTQPASVSGSPGQSITISCTGTNRDVGGYNYVSWYQQHPGKAPKLMIYDVSNRPSGVSNRFSGSKSGNTASLTISGLQADDEAEYYCSSYTSSGTRVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 273)CAGAGCGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAACAGAGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCATGATTTATGATGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGACGACGAGGCTGAGTATTACTGCAGCTCATATACAAGCAGCGGCACTCGAGTCTTCGGAACTGGGACCAAGGTCACCG TCCTAH-Variable (AA): (SEQ ID NO: 274)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYIMVWVRQAPGKGLEWVSSIYPSGGVTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDVAGALDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 275)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACATTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCGTTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATGTT GCCGGAGCTCTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC29. 806C-M0045-C12 L-Variable (AA): (SEQ ID NO: 276)QYELTQPASVSGSPGQSITISCTGTSTDVGGYNYVSWYQKHPGKAPKLMIYDVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTNTITVVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 277)CAGTACGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCACTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAAAAACACCCAGGCAAAGCCCCCAAACTCATGATTTATGATGTCAGTAACCGGCCCTCTGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGACTATTACTGCAGCTCATATACAAACACCATCACCGTGGTGTTCGGCGGAGGGACCAAGCTGACCG TCCTAH-Variable (AA): (SEQ ID NO: 278)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYWMHWVRQAPGKGLEWVSSIYSSGGRTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCAHTDSSTWYRWYFDLWGRGTLVTVSS H-Variable(DNA): (SEQ ID NO: 279)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACTGGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATTCTTCTGGTGGCCGTACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCCTAAGGGCTGAGGACACCGCCATGTATTACTGTGCACACACTGATAGCAGCACCTGGTACCGGTGGTACTTCGATCTCTGGGGCCGTGGCACCCTGGTCACCGTCTCAAGC 30. 806C-M0045-D01 L-Variable(AA): (SEQ ID NO: 280)QDIQMTQSPSTLSSSVGDRVTITCRASQSVSNWLAWYQQKPGKAPKVLIYKASTLESGVPSRFSGSGSGTEFTLTISSLQPDDFATYYCQHYHRYSRTFGQGTKVEIK L-Variablie (DNA): (SEQ IDNO: 281)CAAGACATCCAGATGACCCAGTCTCCTTCCACCCTGTCTTCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCCAGTCAGAGTGTTAGTAACTGGTTGGCCTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGGTCCTAATCTATAAGGCGTCTACTTTAGAAAGTGGGGTCCCGTCAAGGTTCAGCGGCAGTGGATCTGGGACAGAATTCACTCTCACCATCAGCAGCCTGCAGCCTGATGATTTTGCAACTTATTACTGCCAACATTATCATCGTTATTCTCGAACGTTCGGCCAAGGGACCAAGGTGGAAATCAAAH-Variable (AA): (SEQ ID NO: 282)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYKMTWVRQAPGKGLEWVSSIYPSGGWTWYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDNWQGGAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 283)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACAAGATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTGGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATAACTGGCAGGGCGGTGCTTTTGACATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 31. 806C-M0045-D07 L-Variable (AA):(SEQ ID NO: 284)QDIQMTQSPGTLSLSPGERATLSCRASQSVNSNQLAWYQQKPGQAPRLLIYGASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNFWTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 285)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAACAGCAACCAGTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTCTATTACTGTCAGCAGCGTAGCAACTTTTGGACGTTCGGC CAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 286)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYLMMWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARVAPYDSSGSVNYAFDPWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 287)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCTTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCCAGAGTCGCCCCCTATGATAGTAGTGGTTCGGTAAATTACGCGTTCGACCCCTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 32. 806C-M0045-G01L-Variable (AA): (SEQ ID NO: 288)QDIQMTQSPSSLSASVGDRVTITCRASQNINIYLNWYQQKPGRAPSLLIYTQSNLRSGVPSRFSGSGYGTDFTLTISGLQPEDFATYYCQQSHSAPRTFGQGTRVEIK L-Variable (DNA): (SEQ IDNO: 289)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAACATTAACATCTATTTGAATTGGTATCAGCAGAAGCCAGGGAGAGCCCCTAGCCTCCTGATTTATACTCAATCCAATTTGCGAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATATGGCACAGATTTCACTCTCACCATCAGCGGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTCACAGTGCCCCCCGGACGTTCGGC CAGGGGACCAGGGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 290)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYKMVWVRQAPGKGLEWVSVIYPSGGWTRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAREMIDTISPGWHFDLWGRGTLVTVSS H-Variable(DNA): (SEQ ID NO: 291)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACAAGATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTGGACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGAAATGATTGACACTATTTCGCCCGGCTGGCACTTCGATCTCTGGGGCCGTGGCACCCTGGTCACCGTCTC AAGC33. 806C-M0045-G10 L-Variable (AA): (SEQ ID NO: 292)QSELTQDPAVSVALGQTVRITCQGDSLRSYYASWYQQKPGQAPVLVMYGKNNRPSGIPDRFSGSSSGNTASLTITGAQAEDEADYYCQSRGSSSGNHYVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 293)CAGAGCGAATTGACTCAGGACCCTGCTGTGTCTGTGGCCTTGGGACAGACAGTCAGGATCACATGCCAAGGAGACAGCCTCAGAAGCTATTATGCAAGCTGGTACCAGCAGAAGCCAGGACAGGCCCCTGTACTTGTCATGTATGGTAAAAACAACCGGCCCTCAGGGATCCCAGACCGATTCTCTGGCTCCAGTTCAGGAAACACAGCTTCCTTGACCATCACTGGGGCTCAGGCGGAAGATGAGGCTGACTATTACTGTCAGTCCCGGGGCAGCAGCAGTGGTAACCATTATGTCTTC GGAACTGGGACCAAGGTCACCGTCCTAH-Variable (AA): (SEQ ID NO: 294)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYQMMWVRQAPGKGLEWVSSIYPSGGFTRYADSVKGRFTISRDNSKNILYLQMNSLRAEDTAVYYCAKSYYYGSGTYHYSYYGMDVWGQGTTVTVSSH-Variable (DNA): (SEQ ID NO: 295)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCAGATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTTTACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATATTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTATATTACTGTGCGAAATCATATTACTATGGGTCGGGGACCTATCATTACTCTTACTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 34. 806C-M0046-A11 L-Variable (AA): (SEQ ID NO: 296)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSTYLAWYQQKPGQAPRLLIYGASSRATGIPDRFTGSGSGTDFTLTISRLEPEDFAVYYCQHYGSSPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 297)CAAGACATCCAGATGACCCAGTCTCCAGGCACCTTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGTAGCACCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCACTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCACTATGGTAGCTCACCGCTCACTTTCGGCGGAGGGACCAAGGTGGAGATCA AAH-Variable (AA): (SEQ ID NO: 298)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYRMDWVRQAPGKGLEWVSGIYPSGGHTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCARLYLWGSYPTQVAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 299)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCGTATGGATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCCATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACGTATTACTGTGCGAGACTTTACCTTTGGGGGAGTTATCCCACCCAGGTTGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 35. 806C-M0046-B06L-Variable (AA): (SEQ ID NO: 300)QDIQMTQSPATLSVSPGERATLSCRASQSVSSNLAWYQQKPGQAPRLLIYGASTRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 301)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCACCAGGGCCACTGGTATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCGCTCACTTTCGGCGGAGGGACCAAGGTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 302)EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYPMLWVRQAPGKGLEWVSSIYPSGGMTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQGYYDSSGWTFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 303)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATGTACCCTATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCATGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACAAGGTTACTATGATAGTAGTGGGTGGACCTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 36. 806C-M0046-B10 L-Variable(AA): (SEQ ID NO: 304)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPLTFGGGTKVEIK L-Varible (DNA): (SEQ ID NO:305) CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCGCTCACTTTCGGC GGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQ IDNO: 306)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYVMNWVRQAPGKGLEWVSGIYSSGGYIYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCARRHFNGVGFDLWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 307)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACGTTATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATTCTTCTGGTGGCTATATTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACATATTACTGTGCGAGAAGACATTTCAACGGGGTTGGTTTTGATCTCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 37. 806C-M0046-G12 L-Variable (AA):(SEQ ID NO: 308)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSNLAWYQQKPGQAPRLLIYGASTRATGIPARFSGSGSGTEFTLTISSLQSEDFAVYYCQLYKTFGGGTKVEIK L-Variable (DNA): (SEQ ID NO:309) CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCAACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCACCAGGGCCACTGGTATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGAGTTCACTCTCACCATCAGCAGCCTGCAGTCTGAAGATTTTGCAGTTTATTACTGTCAGCTGTATAAGACTTTCGGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA):(SEQ ID NO: 310)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMNWVRQAPGKGLEWVSVIYPSGGGTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVGYSSGWFLFYGMDVWGQGTTVTVSS H-Variable(DNA): (SEQ ID NO: 311)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGGTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCTGTGTATTACTGTGCGAGAGTCGGGTATAGCAGTGGCTGGTTTCTCTTTTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 38. 806C-M0046-H03 L-Variable (AA): (SEQ ID NO: 312)QSALTQPRSVSGSPGQSVTISCTGSNTDVGRYNFVSWYQQKPGKAPKLIIYDVYKRPSGVPDRFSGSKSGNTASLTISGLQADDEADYYCCSYARASTFSYVFGIGTEVTVL L-Variable (DNA): (SEQID NO: 313)CAGAGCGCTTTGACTCAGCCTCGCTCAGTGTCCGGGTCTCCTGGACAGTCAGTCACCATCTCCTGCACTGGATCCAATACTGATGTTGGTCGATACAATTTTGTTTCCTGGTACCAACAAAAGCCAGGCAAAGCCCCCAAACTCATAATTTATGATGTCTATAAGCGGCCCTCAGGGGTCCCTGATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGACGATGAGGCTGATTATTACTGCTGCTCATATGCTCGCGCCTCCACTTTCTCTTATGTCTTCGGAATTGGGACCGAAGTCACCGTCCTT H-Variable (AA): (SEQ ID NO: 314)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYIMVWVRQAPGKGLEWVSSIYPSGGHTPYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQTGGYAHFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 315)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACATTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCATACTCCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACAGACGGGTGGCTACGCCCACTTTGATTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 39. 806C-M0046-H10 L-Variable (AA):(SEQ ID NO: 316)QDIQMTQSPSSLSASVGDRVTMTCRASQGIGTYLAWYQQKPGKVPKLLIYAASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDVATYYCQKYNSAPRPFGQGTQVEIK L-Variable (DNA): (SEQ IDNO: 317)CAAGACATCCAGATGACCCAGTCTCCGTCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATGACTTGCCGGGCGAGTCAGGGCATTGGCACTTATTTAGCCTGGTATCAGCAGAAACCAGGGAAAGTTCCTAAGCTCCTGATCTATGCTGCGTCCACTTTGCAATCAGGGGTCCCATCTCGGTTCAGTGGCAGTGGATCTGGGACGGATTTCACTCTCACCATCAGCAGCCTGCAGCCTGAAGATGTTGCAACTTATTACTGTCAAAAGTATAACAGTGCCCCTCGTCCGTTCGGCCAAGGGACCCAGGTGGAAATCAAAH-Variable (AA): (SEQ ID NO: 318)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYVMHWVRQAPGKGLEWVSSIYPSGGWTLYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARAVGPFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 319)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACGTTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTCTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGCAGTG GGACCTTTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC40. 806C-M0046-H11 L-Variable (AA): (SEQ ID NO: 320)QYELIQPPSVSGIPGQRVTISCSGNNSNFGSNTVTWYQQLPGTAPKLLIYSDSRRPSGVPDRFSGSRSDTSASLAISGLQSEDEAEYHCAAWDDSLNGVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 321)CAGTACGAATTGATTCAGCCACCCTCAGTGTCTGGGATCCCCGGACAGAGGGTCACCATCTCTTGTTCTGGAAACAACTCCAACTTCGGAAGTAATACTGTAACCTGGTACCAGCAGCTCCCAGGAACGGCCCCCAAACTCCTCATCTATAGTGATAGTCGGCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAGGTCTGACACCTCAGCCTCCCTGGCCATCAGTGGGCTCCAGTCTGAGGATGAGGCTGAGTATCACTGTGCAGCATGGGATGACAGCCTAAATGGGGTGTTC GGCGGAGGGACCAAGCTGACCGTCCTA H-Variable (AA): (SEQID NO: 322)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMEWVRQAPGKGLEWVSVIYPSGGHTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGGYYDILTGYYKYYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 323)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGGAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCCATACTAATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGAGGCTATTACGATATTTTGACTGGTTATTATAAGTACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 41. 806C-M0047-B03L-Variable (AA): (SEQ ID NO: 324)QDIQMTQSPSPLSASVGDSVTITCRASQRIGSYLNWYQQNPGKAPKLLIYGASNLESGVPSRFSGRGSGTEFTLTITSLQPEDFATYFCQQTSSVSPLTFGQGTRLDIK L-Variable (DNA): (SEQ IDNO: 325)CAAGACATCCAGATGACCCAGTCTCCATCCCCCCTGTCTGCATCTGTAGGAGACAGTGTCACCATCACTTGTCGGGCAAGTCAGAGGATTGGCAGCTACTTGAATTGGTATCAGCAGAATCCAGGCAAAGCCCCAAAACTCCTGATCTACGGTGCATCCAATTTGGAAAGTGGGGTCCCATCAAGGTTCAGTGGCCGTGGATCTGGGACAGAGTTCACACTCACCATCACCAGTCTGCAACCTGAAGATTTTGCAACTTATTTCTGTCAACAGACCTCCAGTGTCTCCCCGCTCACCTTC GGCCAAGGGACACGACTGGACATTAAA H-Variable (AA): (SEQID NO: 326)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMSWVRQAPGKGLEWVSVIYPSGGWTWYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARMMYYYDSSGYLRADAFDIWGQGTMVTVSSH-Variable (DNA): (SEQ ID NO: 327)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTGGACTTGGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAATGATGTATTACTATGATAGTAGTGGTTACCTAAGGGCTGATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 42.806C-M0047-D01 L-Variable (AA): (SEQ ID NO: 328)QDIQMTQSPGTLSTSIGDRVTITCRASQSINEWLAWYQQKPGKAPKLLIYAASSLQSGVPSRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSPALTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 329)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTCTCTACATCTATAGGAGACAGAGTCACCATCACTTGCCGGGCCAGTCAGAGTATTAATGAGTGGTTGGCCTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATGCTGCATCCAGTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACCCGCGCTCACTTTCGGCGGAGGGACCAAGGTGGAGATCA AAH-Variable (AA): (SEQ ID NO: 330)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYKMMWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTALYYCARSMGYGDAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 331)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACAAGATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGTTTAAGGGCTGAGGACACCGCCTTGTATTACTGTGCGAGATCAATGGGCTATGGTGATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 43. 806C-M0047-D03 L-Variable (AA):(SEQ ID NO: 332)QDIQMTQSPSSLSASVGDRVTITCRASQTIRSYLNWYQQKPGKAPKLLIYAASNLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYSMSSWTFGQGTNLEIK L-Variable (DNA): (SEQ IDNO: 333)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACAATCACTTGCCGGGCAAGTCAGACCATTAGAAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTATGCTGCATCCAATTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACAGTATGTCGTCGTGGACTTTTGGCCAGGGGACCAACCTGGAGATCA AAH-Variable (AA): (SEQ ID NO: 334)EVQLLESGGGLVQPGGSLRLSCAASGFTFSVYPMAWVRQAPGKGLEWVSWISPGGKTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCARGSRHYDKFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 335)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGTTTACCCTATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTGGATCTCTCCTGGTGGCAAGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACGTATTACTGTGCGAGAGGGAGCCGCCACTATGATAAGTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 44. 806C-M0047-E10 L-Variable (AA): (SEQID NO: 336)QSVLTQPASVSGSPGQSITISCTGTSSDVGGYNYVSWYQQHPGKAPKVMIYDVSNRPSGVSNRFSGSKSGNTASLTISGLLAEDEADYYCSSYTSTATYVLGTGTRVTVV L-Variable (DNA): (SEQ IDNO: 337)CAGAGCGTCTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGTTGGTGGTTACAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAAGTCATGATTTATGATGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCGGGGCTCCTGGCTGAGGACGAAGCTGATTATTACTGCAGCTCATATACAAGTACAGCCACCTATGTC CTCGGAACTGGGACCAGGGTCACCGTCGTAH-Variable (AA): (SEQ ID NO: 338)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYKMAWVRQAPGKGLEWVSVIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARALPGGYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 339)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACAAGATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGGGCCTTACCGGGGGGCTACTTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 45.806C-M0047-G09 L-Variable (AA): (SEQ ID NO: 340)QDIQMTQSPGTLSLSPGERATLACRASQSVSSSYLAWYQQKPGQAPRLLIYGASNRATGIPDRFSGSGSDTDFTLKISRVEAEDVGTYYCMQATFWPYAFGQGTKLEIK L-Variable (DNA): (SEQ IDNO: 341)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCGCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAACAGGGCCACTGGCATCCCAGACAGATTCAGCGGCAGTGGGTCAGACACTGATTTCACACTGAAAATCAGCAGGGTGGAGGCTGAGGATGTTGGGACTTATTACTGCATGCAAGCTACATTCTGGCCGTACGCTTTT GGCCAGGGGACCAAGCTGGAGATCAAA H-Variable (AA): (SEQID NO: 342)EVQLLESGGGLVQPGGSLRLSCAASGFTFSWYRMVWVRQAPGKGLEWVSGIYPSGGFTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVYYYDSSGYYFRGGFDPWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 343)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTGGTACCGTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCTTTACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTGTATTACTATGATAGTAGTGGTTATTATTTCCGTGGGGGGTTCGACCCCTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 46. 806C-M0053-A02 L-Variable (AA): (SEQ ID NO: 344)QSVLTQPPSVSGIPGQRVTISCSGNNSNFGSNTVTWYQQLPGTAPKLLIYSDSRRPSGVPDRFSGSRSDTSASLAISGLQSEDEAEYHCAAWDDSLNGVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 345)CAGAGCGTCTTGACTCAGCCACCCTCAGTGTCTGGGATCCCCGGACAGAGGGTCACCATCTCTTGTTCTGGAAACAACTCCAACTTCGGAAGTAATACTGTAACCTGGTACCAGCAGCTCCCAGGAACGGCCCCCAAACTCCTCATCTATAGTGATAGTCGGCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAGGTCTGACACCTCAGCCTCCCTGGCCATCAGTGGGCTCCAGTCTGAGGATGAGGCTGAGTATCACTGTGCAGCATGGGATGACAGCCTAAATGGGGTGTTC GGCGGAGGGACCAAGCTGACCGTCCTA H-Variable (AA): (SEQID NO: 346)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYLMQWVRQAPGKGLEWVSSIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCATRKDGYSRSAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 347)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACCTTATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAACAAGGAAGGATGGCTACAGTCGAAGTGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 47.806C-M0053-A03 L-Variable (AA): (SEQ ID NO: 348)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQRGNWPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 349)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGCGTGGCAACTGGCCCCGGACGTTC GGCCAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQID NO: 350)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYVMWWVRQAPGKGLEWVSGIYPSGWTVYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKDLGGTRAFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 351)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACGTTATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTTGGACTGTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAAGATCTGGGGGGGACCCGTGCCTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 48.806C-M0053-A05 L-Variable (AA): (SEQ ID NO: 352)QSELTQPASVSGSPGQSITISCTGTSSDDVGGYNYVSWYQQHPGKAPKLLIYDVSDRPSGVSNRFSGSKSGNTASLTISGLLAEDEADYYCGSYRVTSVSRSYVFGTETK L-Variable (DNA): (SEQ IDNO: 353)CAGAGCGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCCTGATTTATGATGTCAGTGATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCTGGCTGAGGACGAGGCTGATTATTATTGCGGCTCATATCGCGTCACCAGCGTCAGC AGATCCTATGTCTTCGGAACTGAGACCAAG H-Variable (AA):(SEQ ID NO: 354)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYPMTWVRQAPGKGLEWVSRIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGRIAALDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 355)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACCCTATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGGGGTCGT ATAGCAGCTCTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC49. 806C-M0053-A09 L-Variable (AA): (SEQ ID NO: 356)QSALTQGPTVSVALGQTVRITCQGDTLRYFSASWYQQKPGQAPVLVIFGANNRPSGIPDRFSGSRSGVTASLTITGAQAEDEAEYYCNSRDGSGNWLFGGGTKLSVL L-Variable (DNA): (SEQ ID NO:357) CAGAGCGCTTTGACTCAGGGCCCTACTGTGTCTGTGGCCTTGGGACAGACAGTCAGGATCACATGTCAAGGAGACACCCTCAGATACTTTTCTGCAAGTTGGTACCAGCAGAAGCCGGGACAGGCCCCTGTCCTTGTCATCTTTGGGGCAAACAATCGGCCCTCAGGGATCCCAGACCGGTTCTCTGGCTCCAGGTCAGGAGTCACCGCTTCCTTGACCATCACTGGGGCTCAGGCGGAAGATGAGGCTGAGTATTACTGTAACTCCCGGGACGGCAGTGGTAATTGGCTGTTCGGCGGA GGGACCAAGCTGTCCGTCCTC H-Variable (AA): (SEQ ID NO:358) EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMHWVRQAPGKGLEWVSVIYPSGGATLYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGQYSSGWYTEGWFDPWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 359)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTCTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGCCAGTATAGCAGTGGCTGGTACACGGAGGGCTGGTTCGACCCCTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 50. 806C-M0053-B09 L-Variable (AA): (SEQ ID NO: 360)QYELTQPPSASGTPGQRVTISCSGSSSNIGSNNVNWYQQLPGTAPKLLIYSNDQRPSGVPDRFSGSKSATSASLAISGLQSEDEADYHCAAWDDSLNGPVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 361)CAGTACGAATTGACTCAGCCACCCTCAGCGTCTGGGACCCCCGGGCAGAGGGTCACCATCTCTTGTTCTGGAAGCAGCTCCAACATCGGAAGTAATAATGTCAACTGGTACCAGCAACTCCCAGGAACGGCCCCCAAACTCCTCATCTACAGTAATGATCAGCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAAGTCTGCCACCTCAGCCTCCCTGGCCATCAGTGGGCTCCAGTCTGAGGATGAGGCTGATTATCACTGTGCAGCATGGGATGACAGCCTGAATGGTCCGGTG TTCGGCGGAGGGACCAAGCTGACCGTCCTA H-Variable (AA):(SEQ ID NO: 362)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMQWVRQAPGKGLEWVSSIYPSGGITYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGRGTTRAFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 363)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCATTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGACGAGGAACGACGCGGGCTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 51.806C-M0053-B11 L-Variable (AA): (SEQ ID NO: 364)QYELTQPPSVSVAPGQTAKILCGGNDIGRKFVHWYQQKPGQAPVLVVFDDSDRPSGIPERFSGSNSGSTATLTISGVEAGDEADYFCQVWDLSSDHWVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 365)CAGTACGAATTGACTCAGCCACCCTCGGTGTCAGTGGCCCCAGGACAGACGGCCAAGATTCTCTGTGGGGGAAACGACATTGGAAGAAAGTTTGTTCACTGGTACCAGCAGAAGCCAGGCCAGGCCCCTGTGCTGGTCGTCTTTGATGATAGCGACCGGCCCTCAGGGATCCCTGAGCGATTCTCTGGCTCCAATTCTGGGAGCACGGCCACCCTGACCATCAGCGGGGTCGAAGCCGGGGATGAGGCCGACTATTTCTGTCAGGTGTGGGATCTTAGTAGTGATCATTGGGTGTTCGGC GGAGGGACCAAGCTGACCGTCCTA H-Variable (AA): (SEQ IDNO: 366)EVQLLESGGGLVQPGGSLRLSCAASGFTFSDYAMHWVRQAPGKGLEWVSRIGSSGGHTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCATDYYYDSSGYYYPAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 367)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGATTACGCTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCGGTTCTTCTGGTGGCCATACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGACTGACTATTACTATGATAGTAGTGGTTATTACTACCCTGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 52. 806C-M0053-D03 L-Variable (AA): (SEQ ID NO: 368)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSPLFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 369)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACCTCTGTTCGGC GGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQ IDNO: 370)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYAMMWVRQAPGKGLEWVSSIYPSGGSTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVQGGAGAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 371)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGCTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTACAGGGGGGGGCGGGTGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 53.806C-M0053-D06 L-Variable (AA): (SEQ ID NO: 372)QDIQMTQSPSSLSASVGDRVTITCRASQSINTYLNWYQHKPGKAPELLISAASSLQSGVPSRFSGSGSGTDFTLTISSLRPEDFATYYCQQSHSISTFTFGPGTKVDVK L-Variable (DNA): (SEQ IDNO: 373)CAAGACATCCAGATGACCCAGTCTCCATCTTCCCTGTCTGCATCTGTCGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAACACCTATTTAAATTGGTATCAGCACAAACCAGGGAAGGCCCCTGAGCTCCTGATCTCTGCTGCATCTAGCTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCGACCTGAAGATTTTGCGACTTACTACTGTCAACAGAGTCACAGTATATCCACATTCACTTTC GGCCCTGGGACCAAAGTGGATGTCAAG H-Variable (AA): (SEQID NO: 374)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMHWVRQAPGKGFEWVSSIVPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQMYYYDSSGYYVGRFDIWGQGTTVTVSS H-Variable(DNA): (SEQ ID NO: 375)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTTGAGTGGGTTTCTTCTATCGTTCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACAAATGTATTACTATGATAGTAGTGGTTATTATGTCGGGCGTTTTGATATCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 54. 806C-M0053-D12 L-Variable (AA): (SEQ ID NO: 376)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPPRITFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 377)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCCCCGGATCACT TTCGGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA):(SEQ ID NO: 378)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYMMFWVRQAPGKGLEWVSRIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVTVPLDSGSYYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 379)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACATGATGTTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTTACGGTACCCCTTGATAGTGGGAGCTACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTC AAGC55. 806C-M0053-E03 L-Variable (AA): (SEQ ID NO: 380)QDIQMTQSPATLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSPQLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 381)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACCCCAGCTCACT TTCGGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA):(SEQ ID NO: 382)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMWWVRQAPGKGLEWVSSIYPSGGWTQYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKDVGGGGFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 383)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTCAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACTGCCGTGTATTACTGTGCGAAAGATGTTGGGGGGGGTGGCTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 56.806C-M0053-E04 L-Variable (AA): (SEQ ID NO: 384)QDIQMTQSPATLSVSPGERATLSCRASQSVSSNLAWYQQKPGQAPRLLIYGASTRATGIPARFSGSGSGTEFTLTISSLQSEDFAVYYCLTRVTFGGGTKVELK L-Variable (DNA): (SEQ ID NO:385) CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCACCAGGGCCACTGGTATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGAATTCACTCTCACCATCAGCAGCCTGCAGTCTGAAGATTTTGCAGTTTATTACTGTCTAACACGAGTCACTTTCGGCGGAGGGACCAAG GTTGAGCTCAAG H-Variable (AA): (SEQ ID NO: 386)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYKMGWVRQAPGKGLEWVSSIYPSGGWTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDSPLVVPAAIKSGAYYYGMDVWGQGTTVTVSSH-Variable (DNA): (SEQ ID NO: 387)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACAAGATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTACTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATTCCCCCCTAGTAGTACCAGCTGCTATTAAGAGCGGGGCCTACTACTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 57. 806C-M0053-E08 L-Variable (AA): (SEQ IDNO: 388)QSVLTQPPSASGTPGQRVSISCSGSSYNIGVYDVYWYQQLPGTAPKLLIYTNNQRPSGVPDRFSGSKSGTSASLSISGLRSEDEADYYCAAWDDSLAGWVFGGGTKVTVL L-Variable (DNA): (SEQ IDNO: 389)CAGAGCGTCTTGACTCAGCCACCCTCAGCGTCTGGGACCCCCGGGCAGAGGGTCAGTATCTCTTGTTCTGGAAGCAGCTACAACATCGGAGTTTATGATGTATACTGGTACCAGCAGCTCCCAGGAACGGCCCCCAAACTCCTCATCTATACCAATAATCAGCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAAGTCTGGCACCTCAGCCTCCCTGTCCATCAGTGGGCTCCGGTCCGAGGATGAGGCTGATTATTACTGTGCAGCCTGGGATGACAGCCTGGCTGGTTGGGTG TTCGGCGGAGGGACCAAGGTGACCGTCCTA H-Variable (AA):(SEQ ID NO: 390)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMLWVRQAPGKGLEWVSVIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGVLRAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 391)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGGGTA CTAAGAGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC58. 806C-M0053-F04 L-Variable (AA): (SEQ ID NO: 392)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDTSNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPITFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 393)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCGGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATACATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGTCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCGATCACCTTCGGC CAAGGGACACGACTGGAGATTAAA H-Variable (AA): (SEQ IDNO: 394)EVQLLESGGGLVQPGGSLRLSCAASGFTFSGYGMYWVRQAPGKGLEWVSVISPSGGYTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARAYSSGWYLDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 395)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGGTTACGGTATGTATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCTATACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGCGTATAGCAGTGGCTGGTACCTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 59.806C-M0053-F05 L-Variable (AA): (SEQ ID NO: 396)QSVLTQPPSLSVSPGQTARIACSGDNLGSRYISWYQQKSGQSPVVVLYQDYRRPSGIPERISGSNSGNTATLTISGTQAVDEADYYCQAWDRSTAVFGGGTRLTVL L-Variable (DNA): (SEQ ID NO:397) CAGAGCGTCTTGACTCAGCCACCCTCACTGTCCGTGTCCCCAGGGCAGACAGCCCGCATCGCCTGCTCTGGAGATAATTTGGGGAGTAGATATATTTCCTGGTATCAGCAGAAGTCAGGCCAGTCTCCTGTGGTGGTCCTCTATCAAGACTACAGACGGCCCTCAGGGATCCCTGAGCGAATCTCTGGCTCCAACTCTGGGAACACAGCCACTCTGACCATCAGCGGGACTCAGGCTGTGGATGAGGCGGACTATTATTGTCAGGCGTGGGACAGAAGCACTGCGGTGTTCGGCGGAGGG ACCAGGCTGACCGTCCTA H-Variable (AA): (SEQ ID NO:398) EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYMMFWVRQAPGKGLEWVSRIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVTVPLDSGSYYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 399)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACATGATGTTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTTACGGTACCCCTTGATAGTGGGAGCTACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTC AAGC60. 806C-M0053-F06 L-Variable (AA): (SEQ ID NO: 400)QDIQMTQSPDTLSLSPGERATLSCRASHSVTNNRLAWYQQKPGQSPRLLIYGASNRAAGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSHWLYTFGQGTKLEIK L-Variable (DNA): (SEQ IDNO: 401)CAAGACATCCAGATGACCCAGTCTCCAGACACCCTGTCTTTGTCTCCAGGAGAAAGAGCCACCCTCTCATGCAGGGCCAGTCACAGTGTTACTAACAACCGCTTAGCCTGGTACCAGCAGAAACCTGGCCAGTCTCCCAGGCTCCTCATCTATGGTGCATCCAACAGGGCCGCTGGCATCCCTGCCAGGTTCAGTGGCAGTGGCTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAACAGCGTAGCCACTGGCTTTACACTTTT GGCCAGGGGACCAAGCTGGAGATCAAA H-Variable (AA): (SEQID NO: 402)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYIMIWVRQAPGKGLEWVSSIYPSGGQTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDMAVYYCARKNGYNNVFDVWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 403)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACATTATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCAGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACATGGCTGTGTATTACTGTGCAAGAAAAAATGGCTACAATAATGTATTTGATGTCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 61.806C-M0053-F08 L-Variable (AA): (SEQ ID NO: 404)QSALTQPASVSGSPGQSITISCTGTSSDVGSYNLVSWYQQHPGKAPKLMIYEGSKRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCCSYAGSSTYVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 405)CAGAGCGCTTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGATGTTGGGAGTTATAACCTTGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGGCAGTAAGCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACAATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCTGCTCATATGCAGGTAGTAGCACTTATGTC TTCGGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA):(SEQ ID NO: 406)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYPMLWVRQAPGKGLEWVSSIYPSGGWTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCTTPTHNWNDDPDAFDIWGQGTTVTVSS H-Variable(DNA): (SEQ ID NO: 407)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCCTATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCGTGTATTACTGTACCACCCCTACCCACAACTGGAACGATGACCCTGATGCTTTTGATATCTGGGGCCAAGGGACCACGGTCACCGTCTC AAGC62. 806C-M0053-G04 L-Variable (AA): (SEQ ID NO: 408)QSVLTQPPSVSVAPGQTATITCGGNNIGTKSVHWYQQKPGQAPVFVYDDNDRPSGIPERFSGSNSGNTATMTISRVEAGDEADYYCQVWDPTGDQYVFGSGTKVTVL L-Variable (DNA): (SEQ ID NO:409) CAGAGCGTCTTGACTCAGCCACCCTCGGTGTCAGTGGCCCCAGGACAGACGGCCACGATTACCTGTGGGGGAAACAACATTGGAACTAAAAGTGTACACTGGTACCAGCAGAAGCCAGGCCAGGCCCCTGTCTTCGTCTATGATGATAATGACCGGCCCTCAGGGATCCCTGAGCGATTCTCTGGCTCCAACTCCGGGAACACGGCCACCATGACCATCAGCAGGGTCGAAGCCGGGGATGAGGCCGACTATTATTGTCAGGTGTGGGATCCTACTGGTGATCAGTATGTCTTCGGAAGT GGGACCAAGGTCACCGTCCTA H-Variable (AA): (SEQ ID NO:410) EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYKMLWVRQAPGKGLEWVSVIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVVVPAFYYYYYMDVWGKGTTVTVSS H-Variable(DNA): (SEQ ID NO: 411)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACAAGATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTATACTTACTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTAGTAGTACCAGCTTTCTACTACTACTACTACATGGACGTCTGGGGCAAAGGGACCACGGTCACCGTCTC AAGC63. 806C-M0053-G05 L-Variable (AA): (SEQ ID NO: 412)QSELTQPASVSGSPGQSITISCTGTSSDVGGYNYVSWYQQHPGKAPKLMIYEVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSSSTLGGVFGGGTKLTVL L-Variable (DNA): (SEQID NO: 413)CAGAGCGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATACAAGCAGCAGCACTCTCGGG GGGGTATTCGGCGGAGGGACCAAGCTGACCGTCCTA H-Variable(AA): (SEQ ID NO: 414)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYKMDWVRQAPGKGLEWVSSIYPSGGFTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAREKMATMDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 415)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACAAGATGGATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTTTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGAGAAG ATGGCTACAATGGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC64. 806C-M0054-A08 L-Variable (AA): (SEQ ID NO: 416)QYELTQPASVSGSPGQSITISCTGTSSDVGGCNYVSWYQQHPGKAPQLLIYDVSYRPSGVSNRFSGSKSGNTASLTISGLQADDEADYYCSSCTSSSTLFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 417)CAGTACGAATTGACTCAACCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGTTGGTGGTTGTAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCCAACTCTTGATTTATGATGTCAGTTATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGACGACGAGGCTGATTACTACTGCAGCTCATGTACAAGTAGCAGCACTCTCTTC GGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA): (SEQID NO: 418)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMHWVRQAPGKGLEWVSRIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVAGESNGMDVWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 419)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTGGCTGGGGAGTCGAACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 65.806C-M0054-B06 L-Variable (AA): (SEQ ID NO: 420)QDIQMTQSPSSLSASIGDRVTVTCRTSQSIDTYLNWYQQKPGQAPNLLIYGASSLESGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYTTSYTFGRGTTLEIQ L-Variable (DNA): (SEQ IDNO: 421)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCAGCATCTATAGGAGACAGAGTCACCGTCACTTGCCGGACAAGTCAGAGCATTGACACCTATTTAAATTGGTATCAGCAAAAACCAGGGCAAGCCCCTAACCTCCTGATCTATGGTGCATCCAGTTTGGAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACACTACCTCCTACACTTTTGGC CGGGGGACCACGCTGGAGATCCAA H-Variable (AA): (SEQ IDNO: 422)EVQLLESGGGLVQPGGSLRLSCAASGFTFSIYKMQWVRQAPGKGLEWVSSIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQTYYYDSSGYFRNAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 423)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATTTACAAGATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACAAACGTATTACTATGATAGTAGTGGTTATTTCCGCAATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 66. 806C-M0054-B08 L-Variable (AA): (SEQ ID NO: 424)QSVLTQAASVSGSPGQSITLSCTGATRDVSWYQQHPGKAPKLVLYEVNSRPSDVSDRFSGSMSGNTASLTISGLQAEDEADYYCSSTTSRAPRVIFGGGTKLTVL L-Variable (DNA): (SEQ ID NO:425) CAGAGCGTCTTGACTCAGGCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCCTCTCCTGCACTGGAGCCACCAGGGACGTCTCCTGGTACCAACAACACCCAGGCAAGGCCCCCAAACTCGTCCTTTATGAAGTCAATAGTCGCCCCTCAGACGTTTCCGATCGCTTCTCTGGCTCCATGTCTGGCAACACGGCCTCCCTGACCATCTCTGGACTCCAGGCTGAAGACGAGGCTGATTATTACTGCTCCTCAACCACAAGTCGCGCCCCTCGCGTGATTTTCGGCGGAGGGACC AAACTGACCGTCCTA H-Variable (AA): (SEQ ID NO: 426)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYRMVWVRQAPGKGLEWVSWIYPSGGWTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARSNYYDSAATLDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 427)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCGTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTGGATCTATCCTTCTGGTGGCTGGACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGGTCAAATTACTATGATAGTGCTGCGACTCTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 67.806C-M0054-C03 L-Variable (AA): (SEQ ID NO: 428)QDIQMTQSPSSLSASVGDRVTITCRASQTISSYLNWYQQKPGKAPKLLISAASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYSTPSFGQGTKVEIK L-Variable (DNA): (SEQ ID NO:429) CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGACCATTAGCAGCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTCTGCTGCATCCACTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACAGTACCCCCTCGTTCGGCCAA GGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ ID NO:430) EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYQMLWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVGYSSGWYALTSKTFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 431)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACCAGATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTGGGGTATAGCAGTGGCTGGTACGCGTTGACTTCAAAGACTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 68. 806C-M0054-C07 L-Variable (AA): (SEQ ID NO: 432)QDIQMTQSPATLSLSPGDRAILSCRASHNIDNFLAWYQQKPGQAPRLLIYDASHRATGIPPRFSGSGSGTDFTLTISSLEPEDFAVYFCQQRTNWLFGGGTKVEIK L-Variable (DNA): (SEQ ID NO:433) CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCGGGGGATCGAGCCATCCTCTCCTGTAGGGCCAGTCACAATATTGACAACTTCTTAGCCTGGTATCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCTCATAGGGCCACTGGCATCCCCCCCCGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAACCTGAAGATTTTGCTGTGTATTTCTGTCAACAACGGACCAACTGGCTTTTCGGCGGAGGG ACCAAGGTGGAGATCAAA H-Variable (AA): (SEQ ID NO:434) EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYPMNWVRQAPGKGLEWVSRIWPSGGSTVYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDSSRYFDVWGRGTLVTVSS H-Variable (DNA):(SEQ ID NO: 435)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCCTATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTGGCCTTCTGGTGGCTCTACTGTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATTCT TCTCGATACTTCGATGTCTGGGGCCGTGGCACCCTGGTCACCGTCTCAAGC69. 806C-M0054-E04 L-Variable (AA): (SEQ ID NO: 436)QDIQMTQSPATLSVSPGERATLSCRASQSISSNLAWYQQKPGQAPRLLIYGTSTRATGIPARFSGSGSGTEFTLTISSLQSEDFVVYYCQQYKDWPLTFGGGTTVEIK L-Variable (DNA): (SEQ IDNO: 437)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTATTAGCAGTAATTTAGCCTGGTACCAACAAAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTACATCCACCAGGGCCACTGGTATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACCGAGTTCACTCTCACCATCAGCAGCCTGCAGTCTGAAGATTTTGTAGTTTATTACTGTCAGCAGTATAAAGACTGGCCTCTCACTTTCGGC GGAGGGACCACGGTGGAGATCAAG H-Variable (AA): (SEQ IDNO: 438)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMHWVRQAPGKGLEWVSVIYPSGGVTEYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDQYSGHDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 439)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGTTACTGAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATCAA TACAGTGGCCATGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC70. 806C-M0054-G01 L-Variable (AA): (SEQ ID NO: 440)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRYSWPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 441)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTTACAGCTGGCCTCTCACTTTCGGC GGAGGGACCAAGGTGGAGATCAAG H-Variable (AA): (SEQ IDNO: 442)EVQLLESGGGLVQPGGSLRLSCAASGFTFSEYQMIWVRQAPGKGLEWVSYIVPSGGFTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVNYYGMDVWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 443)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGAGTACCAGATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTATATCGTTCCTTCTGGTGGCTTTACTGCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTGAACTACTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 71. 806C-M0054-G05 L-Variable (AA): (SEQ IDNO: 444)QSALTQPASVSGSPGQSISISCTGTNTDVGGYNYVSWYQQHPGKAPKLMIYDVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSSSTWVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 445)CAGAGCGCTTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCAGCATCTCCTGCACTGGAACCAACACTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCATGATTTATGATGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATACAAGTAGTAGCACTTGGGTGTTCGGCGGAGGGACCAAGCTGACCG TCCTAH-Variable (AA): (SEQ ID NO: 446)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYLMEWVRQAPGKGLEWVSGIYPSGGKTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVNVISVAGTGYYYYGMDVWGQGTTVTVSSH-Variable (DNA): (SEQ ID NO: 447)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACCTTATGGAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCAAGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTGAACGTTATATCAGTGGCTGGTACTGGCTACTACTACTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 72. 806C-M0054-H10 L-Variable (AA): (SEQ ID NO: 448)QDIQMTQSPATLSLSPGERATLSCRASQSVSIYLAWYQQKPGQAPRLLIYDASNRATDIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSSWPITFGLGTRLEIK L-Variable (DNA): (SEQ IDNO: 449)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCATCTACTTAGCCTGGTACCAACAGAAACCTGGTCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGACATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAACGTAGCAGCTGGCCGATCACCTTCGGC CTTGGGACACGACTGGAGATTAAA H-Variable (AA): (SEQ IDNO: 450)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYPMIWVRQAPGKGLEWVSVISPSGGHTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARIQYYGGAFDIWGQGKMVTVSS H-Variable (DNA):(SEQ ID NO: 451)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACCCTATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCATACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAATCCAGTACTACGGTGGGGCTTTTGATATCTGGGGCCAAGGGAAAATGGTCACCGTCTCAAGC 73.806C-M0055-A09 L-Variable (AA): (SEQ ID NO: 452)QDIQMTQSPSSLSASVGDGVTITCRASQSINNHLNWYQQKPGKAPKVLIYAASSLQSGVPSRFSGSGSGTDFTLTISSLQPEDFATYYCQQSYSTPWTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 453)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACGGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAACAACCATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGGTCCTGATCTATGCTGCATCCAGTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACAGTACCCCGTGGACGTTCGGCCAAGGGACCAAGGTGGAAATCAAAH-Variable (AA): (SEQ ID NO: 454)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYRMSWVRQAPGKGLEWVSGIYPSGGGTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARPTYYYDSSGYYYSGPIDYWGQGTLVTVSSH-Variable (DNA): (SEQ ID NO: 455)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACCGTATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCGGTACTACTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACCCACGTATTACTATGATAGTAGTGGTTATTACTACTCGGGGCCTATTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 74.806C-M0055-B11 L-Variable (AA): (SEQ ID NO: 456)QYELTQPASVSGSPGQSITISCTGTNTDVGGYNLVSWYQQHPGKAPKLIIYEVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEVDYYCGSYTSSSTHVFGSGTKVTVL L-Variable (DNA): (SEQ IDNO: 457)CAGTACGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAACACTGACGTTGGTGGTTATAACCTTGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATAATTTATGAGGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGTTGATTATTATTGCGGCTCATATACAAGCAGCAGTACTCATGTC TTCGGAAGTGGGACCAAGGTCACCGTCCTA H-Variable (AA):(SEQ ID NO: 458)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYKMHWVRQAPGKGLEWVSVIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGTAGWFDPWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 459)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGGGACT GCAGGGTGGTTCGACCCTTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC75. 806C-M0055-B12 L-Variable (AA): (SEQ ID NO: 460)QSELTQPASVSGSPGQSITISCTGTSSDVGSYNLVSWYQQHPGKAPKLMIYEGSKRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCCSYAGSSTYVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 461)CAGAGCGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGATGTTGGGAGTTATAACCTTGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGGCAGTAAGCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACAATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCTGCTCATATGCAGGTAGTAGCACTTATGTCTTCGGAACTGGGACCAAGGTCACCG TCCTAH-Variable (AA): (SEQ ID NO: 462)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMTWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARQEDGGYGTWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 463)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAGACAGGAG GATGGTGGCTACGGGACTTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC76. 806C-M0055-C05 L-Variable (AA): (SEQ ID NO: 464)QSVLTQDPAVSVALGQTVRITCQGDSLRSYYATWYQQKPGQAPVLVIYGENNRPSGIPDRFSGSSSGNTGSLTITGAQAEDEADYYCNSRDTSGSHLLFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 465)CAGAGCGTCTTGACTCAGGACCCTGCTGTGTCTGTGGCCTTGGGACAGACAGTCAGGATCACATGCCAAGGAGACAGCCTCAGAAGCTATTATGCAACCTGGTACCAACAGAAGCCAGGACAGGCCCCTGTACTTGTCATCTATGGTGAAAACAACCGGCCCTCAGGGATCCCAGACCGATTCTCTGGCTCCAGTTCAGGAAACACAGGTTCCTTGACCATCACTGGGGCTCAGGCGGAAGATGAGGCTGACTATTACTGTAACTCCCGGGACACCAGTGGTAGTCATCTATTATTCGGC GGAGGGACCAAGCTGACCGTCCTG H-Variable (AA): (SEQ IDNO: 466)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYKMLWVRQAPGKGLEWVSSIYPSGGWTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARASYYDSGGYYRENFQFWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 467)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACAAGATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGCCTCTTACTATGATAGTGGAGGTTATTACCGAGAAAACTTCCAGTTTTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 77. 806C-M0055-C07L-Variable (AA): (SEQ ID NO: 468)QDIQMTQSPSSLSASVGDRVTIICRASQSISIYLNWYQQKPGKAPKVLIYDASSLQSGVPSRFSGSGSGTDFSLTITSLQPEDFATYYCQQSYSTPPMYTFGQGTKLEIK L-Variable (DNA): (SEQ IDNO: 469)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCATTTGCCGGGCAAGTCAGAGCATCAGCATCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGGTCCTGATATATGATGCATCCAGTTTGCAAAGTGGGGTCCCATCAAGGTTCAGTGGCAGTGGATCTGGGACAGATTTCAGTCTCACCATCACCAGTCTGCAACCTGAAGATTTTGCAACTTACTACTGTCAACAGAGTTACAGTACCCCTCCCATGTACACTTTTGGCCAGGGGACCAAGCTGGAGA TCAAAH-Variable (AA): (SEQ ID NO: 470)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMHWVRQAPGKGLEWVSVIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCAKGLDFWSGPDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 471)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCTGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACATATTACTGTGCAAAAGGGCTCGATTTTTGGAGTGGCCCGGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 78. 806C-M0055-D03 L-Variable (AA):(SEQ ID NO: 472)QDIQMTQSPSSLSASVGDRVTITCWASQDIRTSLAWYQQKPGKPPKLLIFAASTLQGGVPSRFSGSGSGTEFTLTISGLQPEDFATYYCQHLNGYPLTFGDGTKVEIR L-Variable (DNA): (SEQ IDNO: 473)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCTGGGCCAGTCAGGATATTCGCACTTCTTTAGCCTGGTATCAGCAGAAACCAGGGAAACCCCCTAAACTCCTCATCTTTGCTGCGTCTACTTTGCAAGGTGGGGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGGACAGAATTCACTCTCACAATCTCCGGCCTGCAGCCTGAGGATTTTGCGACTTATTACTGTCAGCACCTTAATGGTTACCCGCTCACTTTCGGC GATGGGACCAAGGTGGAGATCAGAH-Variable (AA): (SEQ ID NO: 474)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYVMQWVRQAPGKGLEWVSVIYPSGGMTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCARIRGDTRAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 475)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACGTTATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCATGACTAATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACGTATTACTGTGCACGGATACGCGGTGACACCAGGGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 79.806C-M0055-D06 L-Variable (AA): (SEQ ID NO: 476)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDLAVYYCQLFGSSPRITFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 477)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTGGCAGTATATTACTGTCAGCTGTTTGGAAGCTCTCCTCGGATCACC TTCGGCCAGGGGACGCGGCTGGAAATTAAA H-Variable (AA):(SEQ ID NO: 478)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYKMWWVRQAPGKGLEWVSVIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARSSLGCSSTSCYDAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 479)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACAAGATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGGTCTTCTCTAGGGTGTAGTAGTACCAGCTGCTATGATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 80. 806C-M0055-D12 L-Variable (AA): (SEQ ID NO: 480)QDIQMTQSPSSLSASVGDRVTITCRASQGISNYLAWYQQKPGKVPKLLIYAASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDVATYYCQKYNSAPWTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 481)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCGAGTCAGGGCATTAGCAATTATTTAGCCTGGTATCAGCAGAAACCAGGGAAAGTTCCTAAGCTCCTGATCTATGCTGCATCCACTTTGCAATCAGGGGTCCCATCTCGGTTCAGTGGCAGTGGATCTGGGACAGATTTCACTCTCACCATCAGCAGCCTGCAGCCTGAAGATGTTGCAACTTATTACTGTCAAAAGTATAACAGTGCCCCCTGGACGTTCGGC CAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 482)EVQLLESGGGLVQPGGSLRLSCAASGFTFSTYGMWWVRQAPGKGLEWVSSISSGGSTVYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDLTTVTGNYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 483)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTACTTACGGTATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTCTTCTGGTGGCTCTACTGTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATCTGACTACGGTGACGGGGAACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 81.806C-M0055-E04 L-Variable (AA): (SEQ ID NO: 484)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSQLAWYQHKRGQPPRLLIYGASSRATGIPDRFSGSGSGTDYILTISRLEPEDFAVYYCQHFGSSPPATFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 485)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTATCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTTCCAGCAGCCAGTTAGCCTGGTACCAGCATAAACGTGGCCAGCCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTACATTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCATTTTGGTAGTTCACCTCCGGCGACG TTCGGCCAAGGGACCAAGGTGGAAATCAAA H-Variable (AA):(SEQ ID NO: 486)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMVWVRQAPGKGLEWVSSIYPSGGVTIYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDGSSSGWYNPRRAFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 487)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCGTTACTATTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATGGAAGTAGCAGTGGCTGGTACAATCCCCGTAGGGCCTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 82. 806C-M0055-E06 L-Variable (AA): (SEQ ID NO: 488)QYELTQPPSLSVSPGQTVKITCSAEKLSEKYVAWYQQRPGQSPVMVIYQDSRRPSGIPERFSGSNSGNTATLTISGTQPMDEADYYCQAWFSDSLPFGSGTKVTVL L-Variable (DNA): (SEQ ID NO:489) CAGTACGAATTGACTCAGCCACCCTCTCTGTCCGTGTCCCCAGGACAGACAGTCAAGATCACCTGCTCTGCAGAGAAGTTGAGTGAGAAATATGTTGCTTGGTATCAACAGAGGCCGGGCCAGTCCCCTGTCATGGTCATCTATCAAGATAGTAGGCGGCCCTCAGGGATCCCTGAGCGATTCTCTGGCTCCAACTCTGGGAACACAGCCACTCTGACCATCAGCGGGACCCAGCCCATGGATGAGGCTGACTACTATTGTCAGGCGTGGTTTAGCGACAGTCTCCCCTTTGGAAGTGGG ACCAAGGTCACCGTCCTA H-Variable (AA): (SEQ ID NO:490) EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYKMIWVRQAPGKGLEWVSSIYPSGGHTIYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCAREGGGATSFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 491)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACAAGATGATCTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCATACTATTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAGAGAGGGCGGGGGAGCTACCTCCTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 83.806C-M0055-E10 L-Variable (AA): (SEQ ID NO: 492)QDIQMTQSPATLSLSPGERATLSCRASQSVRTYLGWYQQKHGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 493)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGGACCTATTTAGGCTGGTACCAACAGAAACATGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCGCTCACTTTCGGCGGAGGGACCAAGGTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 494)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYPMFWVRQAPGKGLEWVSVISPSGGQTSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKSFSGLAALDFWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 495)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACCCTATGTTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCAGACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAATCATTCTCAGGCTTAGCAGCTCTTGACTTCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 84.806C-M0055-E12 L-Variable (AA): (SEQ ID NO: 496)QDIQMTQSPGTLSLSPGERATLSCRASQTVSSGSLAWYQQKPGLAPRLLIYGASRRGTGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSTLPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 497)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGACAGTGAGCAGCGGCTCCTTAGCCTGGTACCAGCAGAAACCTGGCCTGGCTCCCAGGCTCCTCATCTATGGTGCATCCCGTAGGGGCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTACTACTGTCAGCAGTATGGTAGTACACTCCCGCTCACT TTCGGCGGAGGGACCAAGGTCGAGATCAAA H-Variable (AA):(SEQ ID NO: 498)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYTMYWVRQAPGKGLEWVSSIYPSGGWTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDMAVYYCARGRGGSKAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 499)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACACTATGTATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTAATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACATGGCTGTGTATTACTGTGCGAGAGGCCGTGGTGGTAGCAAAGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 85.806C-M0055-F10 L-Variable (AA): (SEQ ID NO: 500)QSELTQPASVSGSPGQSITISCTGTTSDVGGYNYVSWYQQDPGKVPKLIIYEVYNRPSGVSNRFSGSKSGNTASLTISGLRAEDEADYYCSSKTSSVTYVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 501)CAGAGCGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCACCAGTGACGTTGGTGGTTATAACTATGTCTCCTGGTATCAACAGGACCCAGGCAAAGTCCCCAAACTCATAATTTATGAGGTCTATAATCGGCCCTCAGGGGTTTCAAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCGGGCTGAGGACGAGGCTGATTATTACTGCAGCTCAAAAACAAGCAGCGTCACTTATGTC TTTGGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA):(SEQ ID NO: 502)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYVMSWVRQAPGKGLEWVSRIYPSGGGTRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKEAGGSYFLDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 503)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACGTTATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCGGTACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAAGAGGCGGGTGGGAGCTACTTCCTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 86.806C-M0055-G02 L-Variable (AA): (SEQ ID NO: 504)QSELTQPRSVSGSLGQSVTISCTGTTSDVGRYNFVSWYQQYPGRAPKLIIHDVTRRPSGVSDRFSGSKSGNTASLTISGLQAEDEADYYCCSYAGSFYVFGSGTQVTVL L-Variable (DNA): (SEQ IDNO: 505)CAGAGCGAATTGACTCAGCCTCGCTCAGTGTCCGGGTCTCTTGGACAGTCAGTCACCATCTCCTGCACTGGAACCACCAGTGATGTTGGTCGTTATAACTTTGTCTCCTGGTACCAACAGTATCCAGGCAGAGCCCCCAAACTCATCATTCATGATGTCACTCGGCGGCCCTCCGGGGTATCTGATCGCTTCTCTGGCTCCAAGTCCGGCAACACGGCCTCCCTGACCATCTCTGGTCTCCAGGCTGAGGATGAGGCTGATTATTACTGCTGCTCATATGCAGGCAGCTTTTATGTCTTC GGATCTGGGACCCAGGTCACCGTCTTG H-Variable (AA): (SEQID NO: 506)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMIWVRQAPGKGLEWVSGIYPSGGATGYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCARDGGDIVVPDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 507)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCGCTACTGGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACGTATTACTGTGCGAGAGATGGGGGGGATATTGTAGTGCCTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 87.806C-M0055-G03 L-Variable (AA): (SEQ ID NO: 508)QYELTQPPSASGTPGQRVTISCSGSSSNIGTNTVYWYQQLPGTAPKLLIYTNVQRPSGVPDRFSGSKSGTSASLAISGLQSEDEADYYCQSYDGSLSSAVFGGGTQLTVL L-Variable (DNA): (SEQ IDNO: 509)CAGTACGAATTGACTCAGCCACCCTCAGCGTCTGGGACCCCCGGGCAGAGGGTCACCATCTCTTGTTCTGGAAGCAGCTCCAACATCGGAACTAATACTGTATACTGGTACCAGCAGCTCCCAGGAACGGCCCCCAAACTCCTCATCTATACTAATGTCCAGCGGCCCTCAGGGGTCCCTGACCGATTCTCTGGCTCCAAGTCTGGCACCTCAGCCTCCCTGGCCATCAGTGGGCTCCAGTCTGAGGATGAGGCTGATTATTACTGCCAGTCCTATGACGGCAGCCTGAGTTCTGCTGTG TTCGGAGGAGGCACCCAGCTGACCGTCCTC H-Variable (AA):(SEQ ID NO: 510)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYHMGWVRQAPGKGLEWVSSIYSSGGITQYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGRVGGWSLFNWFDPWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 511)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACCATATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATTCTTCTGGTGGCATTACTCAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGGCCGAGTCGGTGGCTGGTCCCTTTTTAACTGGTTCGACCCCTGGGGCCAGGGCACCCTGGTCACCGTCTC AAGC88. 806C-M0055-H04 L-Variable (AA): (SEQ ID NO: 512)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 513)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCGGACGTTCGGC CAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 514)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYPMYWVRQAPGKGLEWVSRIVPSGGWTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDKGDWYFDLWGRGTLVTVSS H-Variable (DNA):(SEQ ID NO: 515)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACCCTATGTATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCGTTCCTTCTGGTGGCTGGACTAACTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATAAGGGGGACTGGTACTTCGATCTCTGGGGCCGTGGCACCCTGGTCACCGTCTCAAGC 89.806C-M0056-A01 L-Variable (AA): (SEQ ID NO: 516)QDIQMTQSPATLSLSPGERATLSCRASQSVSRYLAWYQQKPGQAPRLLIYDTSNRATGIPARFSGSGSGTDFTLTISSLEPEDFAIYYCQQRSNWPPALTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 517)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTCTGTCTCCAGGGGAGAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGGTACTTAGCCTGGTATCAACAAAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATACATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAATTTATTACTGTCAGCAGCGTAGCAACTGGCCTCCGGCGCTCACT TTCGGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA):(SEQ ID NO: 518)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYAMGWVRQAPGKGLEWVSWIYPSGGITSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARITYFDTSVIDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 519)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGCTATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTGGATCTATCCTTCTGGTGGCATTACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCACGGATTACGTATTTTGATACCAGCGTTATTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 90.806C-M0056-A06 L-Variable (AA): (SEQ ID NO: 520)QSVLTQPASVSGSPGQSITISCTGTSSNVGNYNLVSWYQQHPGKAPKLMIYEDNKRPSGVSNRFSVSKSGNTASLTISGLQTEDEAEYYCCSYAGSGTWCFGRRGTRVTV L-Variable (DNA): (SEQ IDNO: 521)CAGAGCGTCTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTAATGTTGGGAATTATAACCTTGTCTCCTGGTACCAGCAGCACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGACAATAAGCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGTGTCCAAGTCTGGCAACACGGCCTCCCTGACAATCTCTGGGCTCCAGACTGAGGACGAGGCTGAATATTACTGCTGCTCATATGCAGGTAGTGGCACTTGGTGT TTCGGGCGGAGGGGAACCAGAGTGACCGTC H-Variable (AA):(SEQ ID NO: 522)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYPMEWVRQAPGKGLEWVSRIVPSGGWTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCASRVVTTYLDYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 523)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACCCTATGGAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCGTTCCTTCTGGTGGCTGGACTACTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGTCGGGTGGTAACTACGTACTTAGACTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 91.806C-M0056-B08 H-Variable (AA): (SEQ ID NO: 524)EVQLLESGGGLVQPGGSLRLSCAASGFTFSVYVMSWVRQAPGKGLEWVSSIYPSGGGTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTATYYCARRKAAAGYLDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 525)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGTTTACGTTATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCGGTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCACATATTACTGTGCGAGACGAAAAGCAGCAGCAGGTTACCTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC L-Variable (AA): (SEQ ID NO: 526)QSALTQPASVSGSPGQSITISCTGTSSDIGAYKHVSWYQQHPGKAPKLMIYEVTNRPSGISNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSRNTWVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 527)CAGAGCGCTTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATTTCCTGCACTGGAACTAGCAGTGACATTGGTGCTTATAAACATGTCTCCTGGTATCAACAACACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGTCACTAATCGGCCCTCAGGGATTTCTAATCGTTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGTTCATATACAAGCCGTAACACTTGGGTA TTTGGCGGAGGGACCAAGCTGACCGTCCTA 92. 806C-M0056-B09L-Variable (AA): (SEQ ID NO: 528)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYDASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGRSPSFGPGTKVDIK L-Variable (DNA): (SEQ IDNO: 529)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAGTAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGGTCACCCTCTTTCGGC CCTGGGACCAAAGTGGATATCAAA H-Variable (AA): (SEQ IDNO: 530)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYKMSWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDMAVYYCARDRPGAFDVWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 531)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACAAGATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACATGGCTGTGTATTACTGTGCAAGAGATCGG CCTGGAGCTTTTGATGTTTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC93. 806C-M0056-C03 L-Variable (AA): (SEQ ID NO: 532)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPDDSATYYCQQYNSYPITFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 533)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGATGATTCTGCAACCTATTACTGCCAACAATATAATAGTTATCCGATCACCTTC GGCCAAGGGACACGACTGGAGATTAAA H-Variable (AA): (SEQID NO: 534)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYKMWWVRQAPGKGLEWVSVIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGIGAVGGFDSWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 535)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACAAGATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGGATCGGAGCAGTGGGCGGGTTTGACTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 94.806C-M0056-C04 L-Variable (AA): (SEQ ID NO: 536)QDIQMTQSPSSLSASVGDRVTIACRASHDISDNLNWYQQKPGRAPKVVISDAFNLEAGVPSRFSGSRSGTYFTFTINSLQPEDVATYYCQQFNNVPYTFGQGTKLEIK L-Variable (DNA): (SEQ IDNO: 537)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCGCTTGCCGGGCGAGTCACGACATTAGTGACAATTTAAATTGGTATCAGCAAAAACCAGGGAGAGCCCCTAAGGTCGTGATCTCCGATGCATTCAATTTGGAAGCAGGGGTCCCATCAAGGTTCAGTGGAAGTAGATCTGGGACATATTTTACTTTCACCATCAACAGCCTGCAGCCTGAAGATGTTGCAACATATTACTGTCAACAATTTAATAATGTCCCGTACACTTTTGGCCAGGGGACCAAGCTGGAGATCAAAH-Variable (AA): (SEQ ID NO: 538)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYIMAWVRQAPGKGLEWVSRIYPSGGKTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQGGGGRAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 539)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACATTATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCAAGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACAGGGTGGTGGTGGGCGTGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 95. 806C-M0056-E08 L-Variable (AA):(SEQ ID NO: 540)QSALTQDPAVSVALGQTVKITCQGDSLRNYYASWYQQKPGQAPIVVIYGKNNRPSGIPDRFSGSRSGSTASLTITGAQAVDEADYYCSSRDTTNYRMEFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 541)CAGAGCGCTTTGACTCAGGACCCTGCTGTGTCTGTGGCCTTGGGACAGACAGTCAAGATCACATGCCAAGGAGACAGTCTCAGAAATTATTATGCAAGCTGGTACCAGCAGAAGCCAGGACAGGCCCCTATAGTTGTCATCTATGGTAAAAACAACCGGCCCTCAGGGATCCCAGACCGTTTCTCTGGCTCCAGGTCAGGAAGCACAGCTTCCTTGACCATCACTGGGGCTCAGGCGGTAGATGAGGCTGACTATTACTGTAGTTCCCGGGACACTACTAATTACCGCATGGAATTCGGC GGAGGGACCAAGCTGACTGTCCTA H-Variable (AA): (SEQ IDNO: 542)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYIMAWVRQAPGKGLEWVSGIYPSGGFTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKIAGGAYHLDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 543)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACATTATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCTTTACTACTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCTGTGTATTACTGTGCGAAAATTGCAGGGGGAGCCTACCACCTTGATTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 96.806C-M0056-F01 L-Variable (AA): (SEQ ID NO: 544)QDIQMIQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPPALTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 545)CAAGACATCCAGATGATCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCCGGCCCTCACTTTCGGCGGAGGGACCAAGGTGGAGA TCAAAH-Variable (AA): (SEQ ID NO: 546)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYGMEWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARRGSGRYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 547)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGGTATGGAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACGGGGTAGTGGCCGGTACTTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 97. 806C-M0056-F02 L-Variable (AA): (SEQID NO: 548)QSELTQPPSASGSPGQSVTITCTGTSSDVGYYNYVSWYQQHPGKAPKLMIFEVSNRPSGVPDRFSGSKSGNTASLTVSGLQAEDEAHYYCSSYAGSDNFVFGSGTKVTVL L-Variable (DNA): (SEQ IDNO: 549)CAGAGCGAATTGACTCAGCCTCCCTCCGCGTCCGGGTCTCCTGGACAGTCAGTCACCATCACCTGCACTGGAACCAGCAGTGACGTTGGTTATTATAACTATGTCTCCTGGTATCAACAACACCCAGGCAAAGCCCCCAAACTCATGATTTTTGAGGTCAGTAATCGGCCCTCAGGGGTCCCTGATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCGTCTCTGGGCTCCAGGCTGAGGATGAGGCTCATTATTACTGCAGCTCATATGCAGGCAGCGACAATTTTGTCTTCGGAAGTGGGACCAAGGTCACCG TCTTAH-Variable (AA): (SEQ ID NO: 550)EVQLLESGGGLVQPGGSLRLSCAASGFTFSIYVMGWVRQAPGKGLEWVSSIYPSGGYTWYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQGGGGRAFDIWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 551)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATTTACGTTATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTATACTTGGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGACAGGGAGGAGGCGGTCGTGCTTTTGATATCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 98.806C-M0056-F10 L-Variable (AA): (SEQ ID NO: 552)QSVLTQPASVSGSPGQSITISCTGTSSDVGGYNYVSWYQQHPGKAPKLMIYDVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSSSTLFYVFGTGTKVTVL L-Variable (DNA): (SEQID NO: 553)CAGAGCGTCTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCATGATTTATGATGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATACAAGCAGCAGCACTCTCTTTTATGTCTTCGGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA): (SEQ ID NO: 554)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMMWVRQAPGKGLEWVSYIVPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVDYYDFWSGYWWSGGYGMDVWGQGTTVTVSSH-Variable (DNA): (SEQ ID NO: 555)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTATATCGTTCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTTGACTATTACGATTTTTGGAGTGGTTATTGGTGGTCGGGGGGGTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 99.806C-M0056-F11 L-Variable (AA): (SEQ ID NO: 556)QDIQMTQSPSFLSASVGDRVTITCRASQGISTYLAWYQQKPGKAPKLLIYATSTLQSGVPSRFSGSGSGTEFTLAISTLQPEDFATYYCQQLNSYPITFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 557)CAAGACATCCAGATGACCCAGTCTCCATCCTTCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCCAGTCAGGGCATAAGCACTTATTTAGCCTGGTATCAGCAAAAGCCAGGGAAAGCCCCTAAGCTCTTGATCTATGCTACATCCACTTTGCAAAGTGGAGTCCCATCAAGGTTCAGCGGCAGTGGGTCTGGGACAGAATTCACTCTCGCAATCAGCACCCTGCAGCCTGAAGATTTTGCAACTTATTACTGTCAACAACTCAATAGTTACCCGATCACTTTCGGC CAAGGGACGCGACTGGAGATTAAA H-Variable (AA): (SEQ IDNO: 558)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMLWVRQAPGKGLEWVSVIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGVLRAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 559)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGCTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGGGTA CTAAGAGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC100. 806C-M0056-G03 L-Variable (AA): (SEQ ID NO: 560)QNIQMTQSPATLSLSPGERATLSCRASQSISSYLAWYQQKPGQVPRLLIYDASNRATGIPARFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSLPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 561)CAAAACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAGAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTATTAGCAGTTACTTAGCCTGGTATCAACAGAAACCTGGCCAGGTTCCCAGGCTCCTCATCTATGATGCATCCAATAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGTATGGTAGTTTACCTCGGACGTTCGGC CAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 562)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYKMHWVRQAPGKGLEWVSVIYPSGGKTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAREMGGSGWYDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 563)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCATCTGGTGGCAAGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGAAATGGGTGGTAGTGGCTGGTACGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 101.806C-M0056-G04 L-Variable (AA): (SEQ ID NO: 564)QDIQMTQSPATLSLSPGARATLSCRASQSVSSYLAWYQQRPGQTPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSRHTFGQGTKLEIK L-Variable (DNA): (SEQ IDNO: 565)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGCAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAGACCTGGCCAGACTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACGACACACTTTTGGC CAGGGGACCAAGCTGGAGATCAAA H-Variable (AA): (SEQ IDNO: 566)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYVMRWVRQAPGKGLEWVSGIYPSGGWTTYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCATVAAAAGAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 567)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACGTTATGCGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCTGGACTACTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAACAGTGGCAGCAGCTGCGGGGGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 102.806C-M0056-G08 L-Variable (AA): (SEQ ID NO: 568)QDIQMTQSPGTLSLSPGERATLSCRASQSISSSYLAWYQQKPGQAPRLLLYGTSNRATGIPDRFSGSGSGTDFTLTISRLEPEDFALYYCQQRYKWPLTFGPGTKVDFK L-Variable (DNA): (SEQ IDNO: 569)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTATTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCCGGCTCCTCCTCTATGGTACATCCAACAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGACTTTGCACTTTATTACTGTCAGCAGCGTTACAAGTGGCCTCTCACTTTC GGCCCTGGGACCAAGGTGGATTTCAAA H-Variable (AA): (SEQID NO: 570)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYGMWWVRQAPGKGLEWVSVISPSGGQTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKGQIHGGNLASWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 571)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACGGTATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCAGACTAATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACTGCCGTGTATTACTGTGCCAAAGGGCAAATCCACGGTGGTAATCTTGCCTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 103.806C-M0056-G12 L-Variable (AA): (SEQ ID NO: 572)QSALTQPASVSGSPGQSITISCTGTSSDVGGYNYVSWYQQHPGKAPKLMISDVSNRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYTSSSTLYVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 573)CAGAGCGCTTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACTAGCAGCGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATGATTTCTGATGTCAGTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATACAAGCAGCAGCACTCTGTAT GTCTTCGGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA):(SEQ ID NO: 574)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMNWVRQAPGKGLEWVSVIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARVGYSSSWDPHFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 575)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAGAGTCGGGTATAGCAGCAGCTGGGACCCCCACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAG C 104.806C-M0056-H04 L-Variable (AA): (SEQ ID NO: 576)QDIQMTQSPATLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTEFTLTISSLQSEDFGVYYCQQYKDWPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 577)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGAGTTCACTCTCACCATCAGCAGCCTGCAGTCTGAAGATTTTGGAGTTTATTATTGTCAGCAGTATAAGGACTGGCCTCGAACGTTC GGCCAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQID NO: 578)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYRMVWVRQAPGKGLEWVSSIYPSGGPTRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARWSYYYDSSGYYPVSGPFDIWGQGTMVTVSSH-Variable (DNA): (SEQ ID NO: 579)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACCGTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCCTACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGATGGTCGTATTACTATGATAGTAGTGGTTATTACCCCGTGAGTGGGCCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 105. 806C-M0056-H12 L-Variable (AA): (SEQ ID NO:580) QDIQMTQSPGTLSLSPGERATLSCRASQGVRSTYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGSSQGFTFGPGTKVDIK L-Variable (DNA): (SEQ IDNO: 581)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGGGTGTTAGAAGTACCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTAGCTCACAGGGTTTCACT TTCGGCCCTGGGACCAAAGTGGATATCAAA H-Vairable (AA):(SEQ ID NO: 582)EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYKMHWVRQAPGKGLEWVSVIYPSGGITAYADSVKGRFTISRDNSKNTLYLQMNSLRADDTAVYYCTREVMGPSDYWGQGTLVTVSS H-Vairable (DNA):(SEQ ID NO: 583)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATGTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCATTACTGCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGATGACACAGCCGTGTATTACTGTACTAGAGAGGTT ATGGGACCATCTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC106. 806C-M0057-B05 L-Vairable (AA): (SEQ ID NO: 584)QDIQMTQSPATLSVSPGERATLSCRSSQSLSNNLAWYQQKPGQAPRLLIYGASTRATGIPARFSGSGSGTEFTLTISSLQSEDFATYYCQQANSFPRTFGQGTKLEIK L-Vairable (DNA): (SEQ IDNO: 585)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGTCCAGTCAGAGTCTTAGCAACAACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCACCAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGAGTTCACTCTCACCATCAGCAGCCTGCAGTCTGAAGATTTTGCAACTTACTATTGTCAACAGGCTAACAGTTTCCCTCGAACTTTTGGC CAGGGGACCAAGCTGGAGATCAAA H-Vairable (AA): (SEQ IDNO: 586)EVQLLESGGGLVQPGGSLRLSCAASGFTFSKYVMHWVRQAPGKGLEWVSSIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCATSTTYSSRPFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 587)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAAGTACGTTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGACCTCTACGACTTATAGCAGCAGGCCCTTTGACTATTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 107.806C-M0057-H07 L-Vairable (AA): (SEQ ID NO: 588)QDIQMTQSPSSLSASVGDRVAITCRASQSIDTYLNWYQHKPGKAPKLLIYAASKLEDGVPSRFSGSGTGTDFTLTIRSLQPEDFASYFCQQSYSSPGITFGPGTKVEIK L-Vairable (DNA): (SEQ IDNO: 589)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTGGGAGACAGAGTCGCCATCACTTGCCGCGCAAGTCAGAGCATCGACACCTATTTAAATTGGTATCAGCACAAACCAGGGAAAGCCCCTAAACTCCTGATCTATGCTGCATCCAAGTTGGAAGACGGGGTCCCATCAAGATTCAGTGGCAGTGGAACTGGGACAGATTTCACTCTCACCATCAGAAGTCTGCAACCTGAAGATTTTGCAAGTTATTTCTGTCAACAGAGCTACTCTAGTCCAGGGATCACTTTC GGCCCTGGGACCAAGGTGGAGATCAAA H-Vairable (AA): (SEQID NO: 590)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYPMMWVRQAPGKGLEWVSVIYSSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARVSRGIYYAMDVWGQGTTVTVSS H-Vairable(DNA): (SEQ ID NO: 591)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCCTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATTCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGTATCTCGCGGGATCTACTACGCTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 108.806C-M0058-A09 L-Vairable (AA): (SEQ ID NO: 592)QDIQMTQSPGTLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASSRATGIPDRFSGSGSGTDFTLTISRLEPEDFVVYYCQQYGRSRYTFGQGTKLEIK L-Vairable (DNA): (SEQ IDNO: 593)CAAGACATCCAGATGACCCAGTCTCCAGGCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAGCAGGGCCACTGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGTAGTGTATTACTGTCAGCAGTATGGTAGGTCACGGTACACTTTT GGCCAGGGGACCAAGCTGGAGATCAAA H-Vairable (AA): (SEQID NO: 594)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYKMHWVRQAPGKGLEWVSSIYPSGGPTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAREGYSSGWYIHWYFDLWGRGTLVTVSS H-Vairable(DNA): (SEQ ID NO: 595)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACAAGATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCCTACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGAAGGGTATAGCAGTGGCTGGTACATTCACTGGTACTTCGATCTCTGGGGCCGTGGCACCCTGGTCACCGTCTCAAGC 109. 806C-M0058-D04L-Variable (AA): (SEQ ID NO: 596)QDIQMTQSPSSLSASVGDRVAITCRASQSIDTYLNWYQQKPGKAPKLLIYDASNLETGVPSRFSGSGSGTHFTFTISSLQPEDFATYYCQQADSFPITFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 597)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTGGGAGACAGAGTCGCCATCACTTGCCGCGCAAGTCAGAGCATCGACACCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAGCTCCTGATCTACGATGCATCCAATTTGGAAACAGGGGTCCCATCAAGGTTCAGTGGAAGTGGATCTGGGACACACTTTACCTTCACCATCAGCAGCCTGCAGCCTGAAGATTTTGCAACTTACTATTGTCAGCAGGCTGACAGTTTCCCGATCACCTTCGGC CAAGGGACACGACTGGAGATTAAA H-Variable (AA): (SEQ IDNO: 598)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYFMTWVRQAPGKGLEWVSGISPSGGITSYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKGSYSDYGVFNSWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 599)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACTTTATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTCTCCTTCTGGTGGCATTACTTCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAAGGCTCATACAGTGATTACGGGGTCTTTAATTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 110.806C-M0058-E09 L-Variable (AA): (SEQ ID NO: 600)QDIQMTQSPATLSVSPGERATLSCRASQSISSSLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 601)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTATTAGCAGCAGCTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCGCTCACTTTCGGC GGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQ IDNO: 602)EVQLLESGGGLVQPGGSLRLSCAASGFTFSNYVMAWVRQAPGKGLEWVSVIYPSGGATYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCTRLAVTHFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 603)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTAATTACGTTATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGCTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTACGAGACTGGCG GTTACTCACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC111. 806C-M0058-F03 L-Variable (AA): (SEQ ID NO: 604)QDIQMTQSPSTLSASVGDRVTITCRASQGISNYLAWYQQKPGKVPKLLIYGASNLQSGVSSRFSGSGSATDFTLTISSLQPEDFATYYCQQFNSYPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 605)CAAGACATCCAGATGACCCAGTCTCCTTCCACCCTGTCTGCATCTGTAGGAGACAGAGTCACCATCACTTGCCGGGCGAGTCAGGGCATTAGCAATTATTTAGCCTGGTATCAACAGAAACCAGGGAAAGTTCCTAAACTCCTGATCTATGGTGCATCTAATTTGCAGTCAGGGGTCTCATCGCGGTTCAGTGGCAGTGGATCTGCGACAGATTTCACCCTCACCATCAGCAGCCTGCAGCCTGAAGATTTTGCAACTTATTACTGTCAACAGTTTAATAGTTACCCTCTGACTTTCGGC GGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQ IDNO: 606)EVQLLESGGGLVQPGGSLRLSCAASGFTFSDYGMAWVRQAPGKGLEWVSVISPSGGQTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCATVRWFGAFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 607)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGATTACGGTATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTCTCCTTCTGGTGGCCAGACTGCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCTGTGTATTACTGTGCCACAGTTAGATGGTTCGGGGCATTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 112.806C-M0058-G03 L-Variable (AA): (SEQ ID NO: 608)QDIQMTQSPGTLSLSPGERATLSCRASQSVTSSFLSWYQHRPGQAPRLLIYATSTRATGIPDRFSGSGSGTDFTLTISRLEPEDFAVYYCQHYHTSPPTYTFGQGTKLEIK L-Variable (DNA): (SEQ IDNO: 609)CAAGACATCCAGATGACCCAGTCTCCAGGCACGCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAAAGTGTGACCAGCAGCTTCTTATCCTGGTACCAGCACAGACCTGGCCAGGCTCCCAGGCTCCTCATCTATGCTACATCCACCAGGGCCACAGGCATCCCAGACAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACTATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCACTATCATACCTCACCTCCCACTTACACTTTTGGCCAGGGGACCAAGCTGGAGATCAAA H-Variable (AA): (SEQ ID NO: 610)EVQLLESGGGLVQPGGSLRLSCAASGFTFSLYLMYWVRQAPGKGLEWVSVIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARGYYYGMDVWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 611)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCTTTACCTTATGTATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAGAGGCTAC TACTACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC113. 806C-M0058-H01 L-Variable (AA): (SEQ ID NO: 612)QSALTQPPSVSVAPGETAEITCGGENIGSKSVHWYQQKPGQAPVLVIYYDNDRPSGIPERFSGSNFGSTATLTISRVEAGDEADYYCQVWDSGSEHYVFGTETKVTVLGQ L-Variable (DNA): (SEQ IDNO: 613)CAGAGCGCTTTGACTCAGCCACCCTCAGTCTCAGTGGCCCCAGGGGAGACGGCCGAAATTACCTGTGGGGGCGAGAACATTGGAAGTAAAAGTGTCCATTGGTACCAGCAGAAGCCAGGCCAGGCCCCAGTGCTGGTCATCTATTATGATAACGACCGCCCCTCAGGGATCCCTGAGCGATTCTCTGGCTCCAACTTTGGGAGCACGGCCACCCTGACCATCAGCAGGGTCGAAGCCGGGGATGAGGCCGACTATTACTGTCAGGTCTGGGATAGTGGCAGTGAGCACTATGTCTTCGGAACTGAGACCAAGGTCACCGTCCTAG GTCAGH-Variable (AA): (SEQ ID NO: 614)EVQLLESGGGLVQPGGSLRLSCAASGFTFSGYIMMWVRQAPGKGLEWVSSIYPSGGHTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARWYYGMDVWGQGTTVTVSS H-Variable (DNA):(SEQ ID NO: 615)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGGTTACATTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGATGGTAT TACGGTATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC114. 806C-M0059-A02 L-Variable (AA): (SEQ ID NO: 616)QSALTQPASVSGSPGQSITISCTGTNSDVGGYNYVSWYQQHPGKAPKLIIFDVTNRPSGVSNRFSGSKAGNTASLTISGLQAEDEADYYCSSYSSTSPRFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 617)CAGAGCGCTTTGACTCAGCCTGCCTCCGTGTCAGGGTCTCCTGGACAGTCGATCACCATTTCCTGCACTGGAACCAACAGTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATAATTTTTGATGTCACTAATCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGGCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATTCAAGTACCAGCCCTCGCTTCGGCGGAGGGACCAAGCTGACCGTCC TGH-Variable (AA): (SEQ ID NO: 618)EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYQMQWVRQAPGKGLEWVSRIYPSGGWTVYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCTRITYDSSGYYDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 619)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATGTACCAGATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTGGACTGTTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCGTGTATTACTGTACACGGATCACGTATGATAGTAGTGGTTATTACGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 115. 806C-M0059-A06 L-Variable (AA):(SEQ ID NO: 620)QDIQMTQSPSSLSASVGDRVAITCRASQSIDTYLNWYQHKPGKAPKLLIYAASKLEDGVPSRFSGSGTGTDFTLTIRSLQPEDFASYFCQQSYSSPGITFGPGTKVEIK L-Variable (DNA): (SEQ IDNO: 621)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTGGGAGACAGAGTCGCCATCACTTGCCGCGCAAGTCAGAGCATCGACACCTATTTAAATTGGTATCAGCACAAACCAGGGAAAGCCCCTAAACTCCTGATCTATGCTGCATCCAAGTTGGAAGACGGGGTCCCATCAAGATTCAGTGGCAGTGGAACTGGGACAGATTTCACTCTCACCATCAGAAGTCTGCAACCTGAAGATTTTGCAAGTTATTTCTGTCAACAGAGCTACTCTAGTCCAGGGATCACTTTCGGCCCTGGGACCAAGGTGGAGATCA AAH-Variable (AA): (SEQ ID NO: 622)EVQLLESGGGLVQPGGSLRLSCAASGFTFSPYKMIWVRQAPGKGLEWVSGIYPSGGWTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARLLPALRGAVMDVWGQGTTVTVSS H-Variable(DNA): (SEQ ID NO: 623)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCCTTACAAGATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCTGGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAGACTGTTACCAGCCTTGCGGGGAGCCGTGATGGACGTCTGGGGCCAAGGGACCACGGTCACCGTCTCAAGC 116. 806C-M0060-B02 L-Variable(AA): (SEQ ID NO: 624)QSVLTQDPTVSVALGQTVRITCRGDRLRSYYSSWYQQKPRQAPVLVMFGRNNRPSGIPDRFSGSTSGSTASLTITATQADDEADYFCSSRDGSGNFLFGGGTKLTVL L-Variable (DNA): (SEQ ID NO:625) CAGAGCGTCTTGACTCAGGACCCTACTGTGTCTGTGGCCTTGGGGCAGACAGTCAGGATCACATGCCGAGGAGACAGACTCAGAAGTTATTATTCAAGTTGGTACCAGCAGAAGCCACGACAGGCCCCTGTTCTTGTCATGTTTGGTAGAAACAACCGGCCCTCAGGGATCCCAGACCGATTCTCTGGCTCCACCTCAGGAAGCACAGCTTCCTTGACCATCACTGCGACTCAGGCGGACGATGAGGCTGACTATTTCTGTAGTTCCCGGGACGGCAGTGGTAATTTCCTCTTCGGCGGAGGGACCAAACTGACCGTCCTT H-Variable(AA): (SEQ ID NO: 626)EVQLLESGGGLVQPGGSLRLSCAASGFTFSIYPMHWVRQAPGKGLEWVSSIYPSGGITRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTALYYCARQRGSGWHDSWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 627)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATTTACCCTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCATTACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCTTGTATTACTGTGCGAGACAACGGGGCAGTGGCTGGCATGACTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 117.806C-M0060-H01 L-Variable (AA): (SEQ ID NO: 628)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPVTFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 629)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCGGTCACCTTCGGC CAAGGGACACGACTGGAGATTAAA H-Variable (AA): (SEQ IDNO: 630)EVQLLESGGGLVQPGGSLRLSCAASGFTFSYYPMVWVRQAPGKGLEWVSVIVPSGGFTAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCARKRPGNAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 631)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTATTACCCTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCGTTCCTTCTGGTGGCTTTACTGCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAGAAAGCGACCTGGAAATGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 118. 806C-M0061-A03 L-Variable (AA): (SEQID NO: 632)QDIQMTQSPSFLSASVGDSVAITCRASQDISRFLAWYQQRPGKAPKLLIFSASTLQSGVPSRFSGSGSGTEFTLTINALQPEDFATYYCQQLSRYSTFGQGTKLEIK L-Variable (DNA): (SEQ ID NO:633) CAAGACATCCAGATGACCCAGTCTCCATCCTTCCTGTCTGCATCTGTAGGAGACAGTGTCGCCATCACTTGCCGGGCCAGTCAGGACATTAGTCGTTTTTTAGCCTGGTATCAGCAAAGACCAGGGAAAGCCCCTAAACTCCTGATTTTTTCTGCTTCCACTTTACAAAGTGGGGTCCCATCCAGGTTCAGCGGCAGTGGATCTGGGACAGAATTTACTCTCACAATCAACGCCCTGCAGCCTGAAGATTTTGCAACTTATTACTGTCAACAACTTAGTCGTTATTCGACGTTCGGCCAAGGCACCAAACTGGAAATCAAA H-Variable (AA): (SEQ ID NO:634) EVQLLESGGGLVQPGGSLRLSCAASGFTFSYYKMWWVRQAPGKGLEWVSSISPGGWTHYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGPVSSGGDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 635)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTATTACAAGATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTCTCCTGGTGGCTGGACTCATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCTAGAGGCCCTGTCAGTAGTGGTGGGGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 119. 806C-M0061-C05 L-Variable (AA): (SEQ IDNO: 636)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 637)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCCGCTCACTTTC GGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQID NO: 638)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYVMMWVRQAPGKGLEWVSSIYPSGGQTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAKIAGGAYHLDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 639)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACGTTATGATGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCCAGACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAAAATTGCAGGGGGAGCCTACCACCTTGATTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 120. 806C-M0061-C06 L-Variable (AA):(SEQ ID NO: 640)QYELTQPASVSGSPGQSITISCTGTSSDVGGYNYVSWYQQHPGKAPKLTIFDVTKRPSGVSDRFSGSKSDNTASLTISGLQAEDEADYYCGSYTSSGSRVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 641)CAGTACGAATTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCACGATTTTTGATGTCACTAAACGGCCCTCAGGGGTTTCTGATCGCTTCTCTGGCTCCAAGTCTGACAATACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAAGACGAAGCTGATTATTACTGCGGCTCATATACAAGCAGCGGCTCTCGGGTC TTCGGAACTGGGACCAAGGTCACCGTCCTC H-Variable (AA):(SEQ ID NO: 642)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMGWVRQAPGKGLEWVSRIYPSGGFTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCTRIREGYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 643)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGGGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCTTTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTACGAGGATAAGGGAAGGGTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 121. 806C-M0061-F07 L-Variable (AA): (SEQ IDNO: 644)QDIQMTQSPSSLSASVGDRVAITCRASQSIDTYLNWYQQKPGKAPKLLIYAASKLEDGVPSRFSGSGTGTDFTLTIRSLQPEDFASYFCQQSYSSPGITFGPGTKVEIK L-Variable (DNA): (SEQ IDNO: 645)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTGGGAGACAGAGTCGCCATCACTTGCCGCGCAAGTCAGAGCATCGACACCTATTTAAATTGGTATCAGCAGAAACCAGGGAAAGCCCCTAAACTCCTGATCTATGCTGCATCCAAGTTGGAAGACGGGGTCCCATCAAGATTCAGTGGCAGTGGAACTGGGACAGATTTCACTCTCACCATCAGAAGTCTGCAACCTGAAGATTTTGCAAGTTATTTCTGTCAACAGAGCTACTCTAGTCCAGGGATCACTTTCGGCCCTGGGACCAAGGTGGAGATCA AAH-Variable (AA): (SEQ ID NO: 646)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYVMTWVRQAPGKGLEWVSSIYPSGGFTAYADSVTGRFTISRDNSKNTLYLQMNSLRAEDTAMYYCAKSTYYYEGSGYYRAFDIWGQGTMVTVSS H-Variable(DNA): (SEQ ID NO: 647)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACGTTATGACTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTTTACTGCTTATGCTGACTCCGTTACAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCATGTATTACTGTGCGAAATCGACTTATTACTATGAGGGTAGTGGTTATTACCGCGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 122. 806C-M0061-G12 L-Variable (AA): (SEQ ID NO: 648)QDIQMTQSPATLSLSPGERATLSCRASQSVSSSYLAWYQQKPGQAPRLLIYGASNRATGIPARFSGSGSGTDFTLTISGLEPEDFVVYYCQKYGSSSLTFGGGTKVETK L-Variable (DNA): (SEQ IDNO: 649)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTCTATCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAGCTACTTAGCCTGGTACCAGCAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGTGGCCTGGAGCCTGAAGATTTTGTAGTGTATTACTGTCAGAAGTATGGTAGTTCATCGCTCACTTTC GGCGGAGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQID NO: 650)EVQLLESGGGLVQPGGSLRLSCAASGFTFSQYKMWWVRQAPGKGLEWVSVIYPSGGVTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAISYSPVGAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 651)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCAGTACAAGATGTGGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCGTTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGATCTCGTATAGTCCCGTGGGGGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC 123.806C-M0061-H09 L-Variable (AA): (SEQ ID NO: 652)QSALTQPPSVSGSPGQSVTISCTGTSSDVGSYNRVSWYRQPPGTAPKVIIYDINNRPSGVPDRFSGSRSGDTAYLTISGLQVEDEADYYCSSFTSSSTYIFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 653)CAGAGCGCTTTGACTCAGCCTCCCTCCGTGTCCGGGTCTCCTGGACAGTCAGTCACCATTTCCTGCACTGGAACCAGCAGTGACGTTGGTAGTTATAACCGTGTCTCCTGGTACCGGCAGCCCCCAGGCACAGCCCCCAAAGTCATCATTTATGACATCAATAATCGGCCCTCAGGTGTCCCTGATCGCTTCTCTGGGTCCAGGTCTGGCGACACGGCCTACCTGACCATCTCTGGGCTCCAGGTGGAGGACGAGGCTGATTATTACTGTAGCTCATTTACAAGCAGCAGCACCTATATC TTCGGAACTGGGACCAAGGTCACCGTCCTG H-Variable (AA):(SEQ ID NO: 654)EVQLLESGGGLVQPGGSLRLSCAASGFTFSVYKMYWVRQAPGKGLEWVSVIYPSGGYTDYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARQLPMSYFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 655)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGTTTACAAGATGTATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTATACTGATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGCGGCAGCTGCCCATGTCGTACTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 124. 806C-M0062-A12 L-Variabe (AA): (SEQID NO: 656)QDIQMTQSPLSLPVTPGEPASMSCRSSQSLLQSNGYNYLDWYLQKPGQSPQLLIYLGSNRASGVPDRFSGSGSGTDFTLKISRVEAEDVGVYYCMQALQTWTFGQGTKVEIK L-Variable (DNA): (SEQID NO: 657)CAAGACATCCAGATGACCCAGTCTCCACTCTCCCTGCCCGTCACCCCTGGAGAGCCGGCCTCCATGTCCTGCAGGTCTAGTCAGAGCCTCCTGCAAAGTAATGGATACAACTATTTGGATTGGTACCTGCAGAAGCCAGGGCAGTCTCCACAGCTCCTGATCTATTTGGGTTCTAATCGGGCCTCCGGGGTCCCTGACAGGTTCAGTGGCAGTGGATCAGGCACAGATTTTACACTGAAAATCAGCAGAGTGGAGGCTGAGGATGTTGGGGTTTATTACTGCATGCAAGCTCTACAAACTTGGACGTTCGGCCAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ ID NO: 658)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMVWVRQAPGKGLEWVSRIYPSGGFTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDKTAHMDVWGKGTTVTVSS H-Variable (DNA):(SEQ ID NO: 659)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCGCGTATCTATCCTTCTGGTGGCTTTACTAATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGATAAGACAGCCCACATGGACGTCTGGGGCAAAGGGACCACGGTCACCGTCTCAAGC 125. 806C-M0062-B05 L-Variable (AA): (SEQ IDNO: 660)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSSWPPLTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 661)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAGCTGGCCTCCGCTCACTTTCGGCGGAGGGACCAAGGTGGAGATCA AGH-Variable (AA): (SEQ ID NO: 662)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMNWVRQAPGKGLEWVSSIYPSGGWTNYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGGRYGDYVRHWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 663)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGAATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCTGGACTAATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCCAGAGGGGGGAGATACGGTGACTACGTGCGTCACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 126.806C-M0062-B07 L-Variable (AA): (SEQ ID NO: 664)QDIQMTQSPATLSVSPGERATLSCRASQSVSSNLAWYQHKPGQAPRLLIYGASIRATGIPARFSGSGSGTEFTLTISSLQSEDFGVYYCQQYKDWPRTFGQGTKVEIK L-Variable (DNA): (SEQ IDNO: 665)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTGTGTCTCCAGGGGAAAGAGCCACTCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCAACTTAGCCTGGTACCAGCACAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGGTGCATCCATCAGGGCCACTGGTATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGAGTTCACTCTCACCATCAGCAGCCTGCAGTCTGAAGATTTTGGAGTTTATTATTGTCAGCAGTATAAGGACTGGCCTCGAACGTTCGGC CAAGGGACCAAGGTGGAAATCAAA H-Variable (AA): (SEQ IDNO: 666)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYRMAWVRQAPGKGLEWVSSIYPSGGVTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARDLSIAAAGTAYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 667)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCGTATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTATCCTTCTGGTGGCGTTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGATCTTAGTATAGCAGCAGCTGGTACTGCCTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 127.806C-M0062-C08 L-Variable (AA): (SEQ ID NO: 668)QDIQMTQSPGTLSLSPGERATLSCRASQSFVGSRNLAWYQQKPGQPPRLLIYGAFNRATGIPGRFSGSGSGTDFTLTISRLEPEDFAVYYCQQYGTSPRTFGGGTKVEIK L-Variable (DNA): (SEQ IDNO: 669)CAAGACATCCAGATGACCCAGTCTCCAGGCACGCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTTTTGTCGGCAGCAGAAACTTAGCCTGGTACCAGCAAAAACCTGGCCAGCCTCCCAGGCTCCTCATCTATGGTGCATTCAACAGGGCCACTGGCATCCCAGGCAGGTTTAGTGGCAGTGGCTCTGGGACAGACTTCACTCTCACCATCAGCAGACTGGAGCCTGAAGATTTTGCAGTGTATTACTGTCAGCAGTATGGTACGTCACCTCGGACTTTCGGCGGAGGGACCAAAGTGGAGA TCAAAH-Variable (AA): (SEQ ID NO: 670)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYVMQWVRQAPGKGLEWFSSIYPSGGATIYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARRGIPGYFDSWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 671)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACGTTATGCAGTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGTTTTCTTCTATCTATCCTTCTGGTGGCGCTACTATTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAAGGGGAATTCCGGGCTACTTTGACTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 128.806C-M0062-D04 L-Variable (AA): (SEQ ID NO: 672)QDIQMTQSPLSLSASIGDRVTITCRASQSISTYLNWYQQKPGKAPKLLIYATSTLQSGVPSRFSGSGSGTEFILTISGLQPEDFATYYCQQFNFYPLTLGGGTRVEIKRT L-Variable (DNA): (SEQ IDNO: 673)CAAGACATCCAGATGACCCAGTCTCCACTCTCCCTGTCTGCATCTATAGGAGACAGAGTCACCATCACTTGCCGGGCAAGTCAGAGCATTAGCACCTATTTAAATTGGTATCAGCAGAAGCCAGGGAAAGCCCCTAAACTCCTGATCTATGCAACTTCCACTTTACAGAGTGGGGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGGACAGAATTCATTCTCACAATCAGCGGCCTGCAGCCTGAAGATTTTGCAACTTATTACTGTCAACAGTTTAATTTTTATCCTCTCACTCTCGGC GGAGGGACCAGGGTGGAGATCAAACGAACT H-Variable (AA):(SEQ ID NO: 674)EVQLLESGGGLVQPGGSLRLSCAASGFTFSSYGMVWVRQAPGKGLEWVSSISPSGGNTGYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGNGGFDSWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 675)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTTCTTACGGTATGGTTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTCTATCTCTCCTTCTGGTGGCAATACTGGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCAAGAGGAAAT GGTGGCTTTGACTCCTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC129. 806C-M0062-E02 L-Variable (AA): (SEQ ID NO: 676)QSVLTQPASVSGSPGQSITISCTGTSSDVGSYNLVSWYQQHPGKAPKLMIYEGSKRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCCSYAGSSTYVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 677)CAGAGCGTCTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGATGTTGGGAGTTATAACCTTGTCTCCTGGTACCAACAGCACCCAGGCAAAGCCCCCAAACTCATGATTTATGAGGGCAGTAAGCGGCCCTCAGGGGTTTCTAATCGCTTCTCTGGCTCCAAGTCTGGCAACACGGCCTCCCTGACAATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCTGCTCATATGCAGGTAGTAGCACTTATGTC TTCGGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA):(SEQ ID NO: 678)EVQLLESGGGLVQPGGSLRLSCAASGFTFSHYVMSWVRQAPGKGLEWVSVIYPSGGWTGYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGVATTSFDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 679)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCATTACGTTATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCTGGACTGGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGGGTGGCAACTACTAGTTTTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC 130.806C-M0062-E03 L-Variable (AA): (SEQ ID NO: 680)QDIQMTQSPATLSLSPGERATLSCRASQSVSSYLAWYQQKPGQAPRLLIYDASNRATGIPARFSGSGSGTDFTLTISSLEPEDFAVYYCQQRSNWPRSITFGQGTRLEIK L-Variable (DNA): (SEQ IDNO: 681)CAAGACATCCAGATGACCCAGTCTCCAGCCACCCTGTCTTTGTCTCCAGGGGAAAGAGCCACCCTCTCCTGCAGGGCCAGTCAGAGTGTTAGCAGCTACTTAGCCTGGTACCAACAGAAACCTGGCCAGGCTCCCAGGCTCCTCATCTATGATGCATCCAACAGGGCCACTGGCATCCCAGCCAGGTTCAGTGGCAGTGGGTCTGGGACAGACTTCACTCTCACCATCAGCAGCCTAGAGCCTGAAGATTTTGCAGTTTATTACTGTCAGCAGCGTAGCAACTGGCCTCGATCGATCACC TTCGGCCAAGGGACACGACTGGAGATTAAA H-Variable (AA):(SEQ ID NO: 682)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYLMRWVRQAPGKGLEWVSGIYPSGGITAYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARASGSYYNYYFDYWGQGTLVTVSS H-Variable(DNA): (SEQ ID NO: 683)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACCTTATGCGTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGGTATCTATCCTTCTGGTGGCATTACTGCTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGCTTCGGGGAGTTATTATAATTACTACTTTGACTACTGGGGCCAGGGCACCCTGGTCACCGTCTCAAGC 131.806C-M0062-E11 L-Variable (AA): (SEQ ID NO: 684)QDIQMTQSPSSLSASVGDRVAITCRASQSIDTYLNWYQHKPGKAPKLLIYAASKLEDGVPSRFSGSGTGTDFTLTIRSLQPEDFASYFCQQSYSSPGITFGPGTKVEIK L-Variable (DNA): (SEQ IDNO: 685)CAAGACATCCAGATGACCCAGTCTCCATCCTCCCTGTCTGCATCTGTGGGAGACAGAGTCGCCATCACTTGCCGCGCAAGTCAGAGCATCGACACCTATTTAAATTGGTATCAGCACAAACCAGGGAAAGCCCCTAAACTCCTGATCTATGCTGCATCCAAGTTGGAAGACGGGGTCCCATCAAGATTCAGTGGCAGTGGAACTGGGACAGATTTCACTCTCACCATCAGAAGTCTGCAACCTGAAGATTTTGCAAGTTATTTCTGTCAACAGAGCTACTCTAGTCCAGGGATCACTTTC GGCCCTGGGACCAAGGTGGAGATCAAA H-Variable (AA): (SEQID NO: 686)EVQLLESGGGLVQPGGSLRLSCAASGFTFSAYVMHWVRQAPGKGLEWVSRIYPSGGITYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARGILTGPNYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 687)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTGCTTACGTTATGCATTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTCGTATCTATCCTTCTGGTGGCATTACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGGGATT TTGACTGGCCCAAACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC132. 806C-M0062-F10 L-Variable (AA): (SEQ ID NO: 688)QSALTQSPSASASLGASVKLTCSLSSGHSSYAIAWHQQQPEKGPQYLMKVNSDGSHTKGDGIPDRFSGSSSGAERYLTISSLQSEDEADYYCQTWGTGSWVFGGGTKLTVL L-Variable (DNA): (SEQ IDNO: 689)CAGAGCGCTTTGACTCAATCGCCCTCTGCCTCTGCCTCCCTGGGAGCCTCGGTCAAGCTCACCTGCAGTCTGAGCAGTGGGCACAGCAGCTACGCCATCGCATGGCATCAGCAGCAGCCAGAGAAGGGCCCCCAGTACTTAATGAAGGTTAACAGTGATGGCAGCCACACCAAGGGGGACGGGATCCCTGATCGCTTCTCAGGCTCCAGCTCTGGGGCTGAGCGCTACCTCACCATCTCCAGCCTCCAGTCTGAGGATGAGGCTGACTATTACTGTCAGACCTGGGGCACTGGCTCTTGGGTGTTCGGCGGAGGGACCAAGCTGACCGTCCTA H-Variable (AA): (SEQ ID NO: 690)EVQLLESGGGLVQPGGSLRLSCAASGFTFSRYKMSWVRQAPGKGLEWVSYIYPSGGHTEYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAREREGTPDYWGQGTLVTVSS H-Variable (DNA):(SEQ ID NO: 691)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTCGTTACAAGATGTCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTATATCTATCCTTCTGGTGGCCATACTGAGTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACGGCCGTGTATTACTGTGCGAGAGAAAGG GAAGGGACCCCTGACTACTGGGGCCAGGGAACCCTGGTCACCGTCTCAAGC133. 806C-M0062-G06 L-Variable (AA): (SEQ ID NO: 692)QSVLTQPASVSGSPGQSITISCTGTSSDDVGGYNYVSWYQQHPGKAPKLLIYDVINRPSGVSNRFSGSKSGNTASLTISGLQAEDEADYYCSSYASSGARVFGTGTKVTVL L-Variable (DNA): (SEQ IDNO: 693)CAGAGCGTCTTGACTCAGCCTGCCTCCGTGTCTGGGTCTCCTGGACAGTCGATCACCATCTCCTGCACTGGAACCAGCAGTGACGACGTTGGTGGTTATAACTATGTCTCCTGGTACCAACAACACCCAGGCAAAGCCCCCAAACTCCTGATTTATGATGTCATTAATCGGCCCTCAGGAGTTTCTAATCGCTTCTCTGGGTCCAAGTCTGGCAACACGGCCTCCCTGACCATCTCTGGGCTCCAGGCTGAGGACGAGGCTGATTATTACTGCAGCTCATATGCAAGCAGCGGCGCTCGA GTCTTCGGAACTGGGACCAAGGTCACCGTCCTA H-Variable (AA):(SEQ ID NO: 694)EVQLLESGGGLVQPGGSLRLSCAASGFTFSIYPMIWVRQAPGKGLEWVSVIYPSGGHTRYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCTRRVYSSGSAYFDLWGRGTLVTVSS H-Variable(DNA): (SEQ ID NO: 695)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATTTACCCTATGATTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTGTTATCTATCCTTCTGGTGGCCATACTCGTTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACAGCCGTGTATTACTGTACGAGACGGGTATATAGTAGTGGTTCTGCGTACTTCGATCTCTGGGGCCGTGGCACCCTGGTCACCGTCTCAAGC 134. 806C-M0062-H01 L-Variable(AA): (SEQ ID NO: 696)QDIQMTQSPSTLSASVGDRVTITCRASQSVAGLLAWFQQKPGKAPKLLISKASILETGVPSRFSGSGSGTEFTLTITSLQPDDFATYYCQQYSFNSGTFGQGTRVEMK L-Variable (DNA): (SEQ IDNO: 697)CAAGACATCCAGATGACCCAGTCTCCTTCCACCCTGTCTGCATCTGTGGGAGACAGAGTCACCATCACCTGCCGGGCCAGCCAGAGTGTTGCTGGCTTGTTGGCCTGGTTTCAGCAGAAACCGGGCAAAGCCCCTAAACTCCTCATCTCTAAGGCGTCTATTTTAGAGACTGGGGTCCCATCAAGGTTCAGCGGCAGTGGATCTGGGACAGAATTCACTCTCACCATCACCAGCCTGCAGCCTGATGATTTCGCAACTTATTACTGCCAACAATATAGTTTCAATTCTGGGACATTCGGCCAAGGGACCAGGGTGGAAATGAAAH-Variable (AA): (SEQ ID NO: 698)EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYKMAWVRQAPGKGLEWVSYIYPSGGYTYYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTALYYCARVRDSAFDIWGQGTMVTVSS H-Variable (DNA):(SEQ ID NO: 699)GAAGTTCAATTGTTAGAGTCTGGTGGCGGTCTTGTTCAGCCTGGTGGTTCTTTACGTCTTTCTTGCGCTGCTTCCGGATTCACTTTCTCTATGTACAAGATGGCTTGGGTTCGCCAAGCTCCTGGTAAAGGTTTGGAGTGGGTTTCTTATATCTATCCTTCTGGTGGCTATACTTATTATGCTGACTCCGTTAAAGGTCGCTTCACTATCTCTAGAGACAACTCTAAGAATACTCTCTACTTGCAGATGAACAGCTTAAGGGCTGAGGACACCGCCTTGTATTACTGTGCGAGAGTAAGGGATTCCGCTTTTGATATCTGGGGCCAAGGGACAATGGTCACCGTCTCAAGC

Example 29 Exemplary Tie1 Antibodies

Tables 5 (FIGS. 37) and 6 (FIG. 38) list CDR regions of exemplary lightand heavy chain variable regions which are listed herein. FIG. 39 (Table9) list properties of some of the exemplary antibodies

Some antibodies described herein include related variable domains. Thesame variable domain can function with a different partner variabledomain. For example, M0044-G06 and M0044-B05 share a HC variable domain,but have different LC variable domains, as do M0044-G07 and M0044-B05.Other antibodies that have the same HC variable domain include: HC54(M0053-D12) and 19(M0044-H05); HC 59(M0053-F05) and 19(M0044-H05); HC72(M0054-H10) and 25(M0045-B03); and HC 98(M0056-F11) and 57(M0053-E08).Some antibodies that have the same LC variable domain include: LC114(M0059-A06) and 106(M0057-H07); LC 130(M0062-E11) and 106(M0057-H07);and LC 115(M0060-B02) and 12(M0044-F03). Some antibodies have the sameCDR3. For example, the CDR3 sequence, QGGGGRAFDI, is present inM0056-004 and M0056-F02. The CDR3 sequence IAGGAYHLDY is present inM0056-E08 and M0061-C05.

In some cases, an antibody can include a non-germline residue. One ormore of such non-germline residues can be modified, e.g., to restore thegermline residue. Exemplary non-germline residues include: L45F (see,e.g., M0053-D06); V48F (see, e.g., M0062-008); delta S53 (see, e.g.,M0045-B01; M0047-D03; M0055-D12; M0061-A03); delta G54 (see, e.g.,M0053-A03); T57I (see, e.g., M0046-B10); E85D (see, e.g., M0056-H12);T87M (see, e.g., M0053-F06; M0055-E12; M0056-B08); V89L (see, e.g.,M0044-B08; M0047-D01; M0060-B02; M0062-H01); V89M (see, e.g., M0044-B10;M0045-C12; M0045-D07; M0053-B11; M0055-B12; M0055-E06; M0056-A01;M0056-G12; M0058-G03; M0059-A06; M0060-H01; M0061-F07); V89T (see, e.g.,M0044-H07; M0046-A11; M0046-B10; M0047-D03; M0055-007; M0055-D03;M0055-G02); A93T (see, e.g., M0045-A02; M0053-F08; M0056-H12; M0058-E09;M0059-A02; M0061-C06; M0062-G06); and T107K (see, e.g., M0045-B03).

Example 30 Sequence of DX-2220 Antibody

DX-2220 is a full length, IgG1, germlined human anti-Tie1 antibody E3b.The sequence of DX-2220 is as follows:

DX-2220 Light Chain Amino Acid Sequence: (SEQ ID NO: 700)DIQMTQSPSSLSASVGDRVTITCRASQGIGHYLAWYQQKPGKVPKLLIYTASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDVATYYCQQFNSYPHTFGQGTRLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQG LSSPVTKSFNRGEC DX-2220Heavy Chain Amino Acid Sequence: (SEQ ID NO: 701)EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYGMVWVRQAPGKGLEWVSVISPSGGNTGYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARAPRGYSYGYYYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSL SPGK An exemplaryDX-2220 Light Chain Nucleotide Sequence: (SEQ ID NO: 702)ggcgtgcactctgacatccagatgacccagtctccatcctccctgtctgcatctgtaggagacagagtcaccatcacttgccgggcgagtcagggcattggccattatttagcctggtatcagcagaaaccagggaaagttcctaagctcctgatctatactgcatccactttgcaatcaggggtcccatctcggttcagtggcagtggatctgggacagatttcactctcaccatcagcagcctgcagcctgaagatgttgcaacttattactgtcaacagtttaatagttaccctcacaccttcggccaagggacacgactggagattaaacgaactgtggctgcaccatctgtcttcatcttcccgccatctgatgagcagttgaaatctggaactgcctctgttgtgtgcctgctgaataacttctatcccagagaggccaaagtacagtggaaggtggataacgccctccaatcgggtaactcccaggagagtgtcacagagcaggacagcaaggacagcacctacagcctcagcagcaccctgacgctgagcaaagcagactacgagaaacacaaagtctacgcctgcgaagtcacccatcagggcctgagctcgcccgtcacaaagagcttcaacaggggagagtgttaataa An exemplary DX-2220 Heavy ChainNucleotide Sequence: (SEQ ID NO: 703)gaagttcaattgttagagtctggtggcggtcttgttcagcctggtggttctttacgtctttcttgcgctgcttccggattcactttctctatgtacggtatggtttgggttcgccaagctcctggtaaaggtttggagtgggtttctgttatctctccttctggtggcaatactggttatgctgactccgttaaaggtcgcttcactatctctagagacaactctaagaatactctctacttgcagatgaacagcttaagggctgaggacactgcagtctactattgtgcgagagccccacgtggatacagctatggttactactactggggccagggaaccctggtcaccgtctcaagcgcctccaccaagggcccatcggtcttcccgctagcaccctcctccaagagcacctctgggggcacagcggccctgggctgcctggtcaaggactacttccccgaaccggtgacggtgtcgtggaactcaggcgccctgaccagcggcgtccacaccttcccggctgtcctacagtcctccggactctactccctcagcagcgtagtgaccgtgccctccagcagcttgggcacccagacctacatctgcaacgtgaatcacaagcccagcaacaccaaggtggacaagaaagttgagcccaaatcttgtgacaaaactcacacatgcccaccgtgcccagcacctgaactcctggggggaccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcaaggtctccaacaaagccctcccagcccccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga

Example 31 DX-2220 Slows Colorectal Cancer Xenograft Tumor Progressionin Nude Mice

Mice (nu/nu) were implanted subcutaneously with 5×10⁶ SW-480 (colorectalcancer) cells. After 12 days, when tumors reached approximately 100-200mg, the mice were separated into 5 groups and treated with the followingagents (or left untreated):

1—Untreated

2—Vehicle (PBS)

3—Cisplatin (4 mg/kg/, IV, q2d×5 times)

4—A2-SV (negative control antibody@10 mg/kg, IP, q2d×14 times)

5—DX-2220 (anti-Tie-1 antibody@10 mg/kg, IP, q2d×14 times)

Throughout the study, the length (L) and width (W) of any tumors thatdeveloped were measured in millimeters using calibrated verniercalipers, where L is the longer of the two dimensions. When applicable,tumor weight (M) in milligrams was calculated by using the formulaassociated with a prolate ellipsoid: M=(L×W²)/2. Table 7 shows theaverage weights (in mg) of the tumors for each of the groups. A2-SV isan isotype matched (IgG1) negative control antibody that bindsstrepavidin.

TABLE 7 Tumor Weight (mg) Days after Group 1 Group 2 Group 3 Group 4Group 5 Cell Injection Untreated Vehicle Cisplatin A2-SV DX-2220 5 57 9548 111 112 9 88 117 69 120 137 12 118 139 137 149 139 15 153 203 185 159145 19 202 309 207 308 186 22 316 431 235 350 224 26 403 532 310 405 29228 449 587 363 526 328

The results from the animal study shown in Table 7 are depictedgraphically in FIG. 5. DX-2220 slowed tumor progression by 44% whencompared to vehicle (PBS)-treated control animals. In addition, DX-2220was as efficacious as the chemotherapeutic control (cisplatin).

Example 32 Production and Testing of Germlined Anti Tie1 E3 Fab and IgGfor Binding to Human and Mouse Tie1 in BIACore

Expression and Purification. Fabs were produced in the E. coli strain,TG1, using an expression vector containing a Pe1B leader sequence forsecretion into the periplasm. Under the conditions used for induction(overnight incubation at 30° C. in the presence of 1 mM IPTG), themajority of the secreted Fab was localized in the culture medium ratherthan the periplasm. The secreted Fab was recovered by adding protein Aresin to the clarified culture medium. This protein A resin was thenpacked into a column to facilitate washing, with PBS, and elution with50 mM sodium phosphate, 150 mM NaCl, pH 2.5. The pH was brought toapproximately neutral by addition of one half volume of 1 M HEPES beforebuffer exchange into PBS The concentration of the purified germlined E3(DX-2220) Fab was determined using OD₂₈₀ 1.4=1.0 mg/ml.

The IgG was produced transiently in HEK293T cells using eitherLIPOFECTAMINE™ 2000 or GENEJUICE™ as the transfection reagent. Antibodycould be produced from cells harvested at 72, 144, and 216 hours posttransfection. Purification of the IgG from the conditioned culture mediaessentially followed the same protocol outlined above for the Fabpurification. The concentration of the purified IgG was determined usingOD₂₈₀ 1.4=1.0 mg/ml.

For preclinical animal studies, IgG were purified using a two-steppurification procedure, initially with protein A chromatographysubsequently followed by ion exchange chromatography (IEX). PurifiedIgGs were subjected to biochemical analyses to assess endotoxin levels,leached protein A, DNA content, and host cell proteins.

Biochemical Analysis

Affinity analysis of the Fab and IgGs was performed using surfaceplasmon resonance using a BIAcore 3000 instrument. For this analysisboth dimeric (Tie1-Fc fusion protein) and monomeric (Tie1-HIS) versionsof the extracellular domain of the Tie1 were used. The sensor chips usedin these experiments were CM5 (dextran-coated) which allowimmobilization of proteins to the chip via standard amine couplingchemistries. The concentration of flowed antibody was determined using asurface plasmon resonance based method. Using a high-density protein Asensor chip, under mass transport limited conditions, the responsesignal is dependent only on the concentration of the antibody in thesample under test. This approach allows a precise determination of theantibody concentration, a parameter important for accurate determinationof the K_(D).

470 RUs of Tie1 HIS protein were coated on a CM5 sensor chip and 5, 20,100, and 500 nM of the Fab flowed over the chip at four different flowrates (10, 30, 50 and 80 μl/s), rates in which the system is not masstransport limited. Kinetic data was typically determined using a rangeof analyte concentrations and three different chip coating densities.The data from the lowest coating density that gave a good signal wastypically chosen, this was often in a range from 50-100 RUs. Using suchlow coating densities allowed the sensor curves to be fit usingBIAEVALUATION™ 3.0 software to a 1:1 model, often even when using abivalent analyte (IgG or Tie1-Fc fusion protein). For bivalent analytes,when fit to a 1:1 model was not possible, the curves were fit using a2:1 model. The generated data is shown in Table 8.

TABLE 8 Kinetic data for binding of DX-2220 Fab and IgG to human Tie1-Fcfusion protein Human Tie1-Fc K_(on) Fab (1/Ms) K_(off)(1/s) K_(D) (nM)Fab Parental 8.26E+03 4.47E−05 5.4 Fab Germlined 9.30E+03 4.41E−05 4.7IgG Parental 6.19E+03 3.61E−05 5.8 IgG Germlined 7.09E+03 3.67E−05 5.2

The anti-Tie1 antibodies described here bind to both human and mouseTie1 molecules. The binding of the anti-Tie1 Fab to mouse Tie1-Fc fusionprotein was compared with the binding of the anti-Tie1 Fab to humanTie1-Fc fusion protein. In both of these experiments the Tie1-Fc fusionprotein was immobilized on the sensor chip and the anti Tie-1 Fab servedas the analyte. Under these experimental conditions the anti-Tie1 Fabhas very similar K_(D) (˜3 nM) values for both the human and mouseTie1-Fc fusion proteins (Table 9). Under conditions that are likely tomimic those used in the animal efficacy experiments, i.e. Tie1-Fcimmobilized to the CM5 sensor chip and anti-Tie1 used as the analyte,the measured K_(D) was 0.2 nM. This greater than 10 fold increase inaffinity represents an avidity effect that results from a bivalentmolecule (anti-Tie1) binding to a multivalent surface (immobilizedTie1-Fc).

Example 33 Sequence of DX-2240: Germlined F Allotyped E3 Antibody

DX-2240 (Light, heavy - variable, constant). Variable region:DIQMTQSPSSLSASVGDRVTITCRASQGIGHYLAWYQQKPGKVPKLLIYTASTLQSGVPSRFSGSGSGTDFTLTISSLQPEDVATYYCQQFNSYPHTFGQ GTRLEIK Lightconstant: RTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTK SFNRGEC SEQ ID NO:724 light chain (variable + constant) DX-2240 Heavy variable:EVQLLESGGGLVQPGGSLRLSCAASGFTFSMYGMVWVRQAPGKGLEWVSVISPSGGNTGYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCARAP RGYSYGYYYWGQGTLVTVSSHeavy constant (CH1, Hinge, CH2, CH3):ASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDK R VEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSR E E M TKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK SEQ ID NO: 723 heavy chain (variable+ constant)

The light chain can optionally further include the following signalsequence: Light signal sequence: MGWSCIILFLVATATGVHS (SEQ ID NO:720) Theheavy chain can optionally further include the following signal sequenceMGWSCIILFLVATATGAHS (SEQ ID NO:721).

Example 34 Characterization of DX-2240 from a GS-CHO Cell Line

The anti-Tie1 antibody DX-2240 (light and heavy chain germlined andf-allotype) antibodies was produced in HEK293T cells. A stable CHO cellline expressing DX-2240 was generated. Using standard molecular biologycloning techniques, the light and heavy chains from DX-2240 was insertedinto glutamine synthase (GS) vector system available from Lonza GroupLtd. CH (see, e.g., Clark et al. (2004) BioProcess International2(4):48-52; Barnes et al. (2002) Biotech Bioeng. 81(6):631-639). Thesingle vector constructs containing the light and heavy chainsrespectively, were then combined to create a single, double gene vector.This DNA construct was then used to generate stable CHO cell lines,grown under MSX selection pressure. One of these clones was thenexpanded and a single 40L stirred bioreactor seeded and run over thecourse of 12 days. Following the completion of this run, 36 liters ofclarified CHO culture supernatant was loaded onto a 200 ml Protein AXK50 column. The column was first washed with PBS pH 7.4, followed by aPBS+0.4M NaCl pH7.4 wash, and then with a final wash of PBS pH 7.4 priorto the low pH elutions. DX-2240 IgG1 was eluted first with 0.1MNaCitrate pH 3.5 followed by the same buffer at pH 3.0. A sharp proteinpeak eluted at pH 3.0. The pH 3.0 elution contained a predominant peakrepresenting DX-2240, with a low level of contaminants eluting shortlythereafter. A high degree of purity (>95%) of DX-2240 was obtained.

Example 35 Sequence Optimization of Nucleic Acid Encoding DX-2240Antibody

To improve expression of DX-2240 in CHO cells, a synthetic gene withoptimized codons and sequences was engineered. The strategies includecodon optimization, CpG island and splice site analysis. An optimizedDX-2240 sequence has been synthesized and reformatted into the glutaminesynthase (GS) vector system. The exemplary codon optimized sequence isas follows:

DX-2240-heavy chain (SEQ ID NO: 725) Signal sequenceATGGGCTGGTCCTGTATCATCCTGTTTCTGGTGGCCACCGCCACCGGCGCTCACTCTGAGGTGCAGCTGCTGGAGTCTGGCGGCGGACTGGTGCAGCCTGGCGGCTCTCTGAGACTGTCTTGTGCCGCCTCCGGCTTCACCTTCTCC ATGTACGGCATGGTG TGGGTGAGGCAGGCCCCTGGCAAGGGCCTGGAGTGGGTGTCC GTGATCTCTCCTTCTGGCGGCAATACCGGCTACGCCGACTCTGTGAAGGGC CGGTTCACCATCTCCCGGGACAACTCCAAGAACACCCTGTACCTGCAGATGAACTCCCTGAGAGCCGAGGATACCGCCGTGTACTACTGTGCCAGA GCCCCTAGAGGCTACTCCTACGGCTACTACTAC TGGGGCCAGGGCACCCTGGTGACCGTGTCCTCTGCTTCTACCAAGGGCCCTTCCGTGTTTCCTCT GGCCCCTTCCTCCAAGTCTACCTCTGGCGGCACCGCCGCTCTGGGCTGCCTGGTGAAGGACTACTTCCCTGAGCCCGTGACAGTGTCCTGGAACTCTGGCGCCCTGACCTCCGGCGTGCACACCTTCCCTGCTGTGCTGCAGTCCTCCGGCCTGTACTCTCTGTCCTCCGTGGTGACAGTGCCTTCCTCTTCTCTGGGCACCCAGACCTACATCTGTAACGTGAACCACAAGCCCTCCAACACCAAGGTGGACAAGCGGGTGGAGCCTAAGTCCTGTGACAAGACCCACACCTGCCCTCCTTGTCCTGCCCCTGAGCTGCTGGGCGGACCTTCTGTGTTCCTGTTCCCCCCCAAGCCTAAGGACACCCTGATGATCTCCAGGACCCCTGAGGTGACCTGTGTGGTGGTGGACGTGTCTCACGAGGATCCCGAGGTGAAGTTCAACTGGTACGTGGACGGCGTGGAGGTGCACAACGCCAAGACCAAGCCTAGGGAGGAGCAGTACAACTCCACCTACCGGGTGGTGTCTGTGCTGACCGTGCTGCACCAGGATTGGCTGAACGGCAAGGAGTACAAGTGTAAGGTGTCCAACAAGGCCCTGCCTGCCCCTATCGAAAAGACCATCTCCAAGGCCAAGGGCCAGCCTAGAGAGCCTCAGGTGTACACCCTGCCTCCTTCCAGGGAGGAGATGACCAAGAACCAGGTGTCCCTGACCTGTCTGGTGAAGGGCTTCTACCCTTCCGATATCGCCGTGGAGTGGGAGTCTAATGGCCAGCCCGAGAACAACTACAAGACCACCCCTCCTGTGCTGGACTCTGACGGCTCCTTCTTCCTGTACTCCAAGCTGACCGTGGACAAGTCCAGATGGCAGCAGGGCAACGTGTTCTCCTGCTCCGTGATGCACGAGGCCCTGCACAATCACTACACCCAGAAGTCCCTGTCTCTGTCCCCCGGCAAGTGATGAGAATTC DX-2240 Light chain (SEQID NO: 726): Signal sequenceATGGGCTGGTCCTGTATCATCCTGTTTCTGGTGGCCACCGCCACCGGCGTGCACTCTGACATCCAGATGACCCAGTCCCCTTCCTCTCTGTCTGCCTCTGTGGGCGACAGAGTGACCATCACCTGTAGAGCCTCTCAGGGCATCGGCCACTACCTGGCCTGGTATCAGCAGAAGCCTGGCAAGGTGCCCAAGCTGCTGATCTACACCGCCTCCACCCTGCAGTCTGGCGTGCCTTCCAGATTCTCCGGCTCTGGCTCTGGCACCGATTTCACCCTGACCATCTCCTCCCTGCAGCCTGAGGATGTGGCCACCTACTACTGCCAGCAGTTCAACTCCTACCCCCACACC TTCGGCCAGGGCACCAGACTGGAGATCAAGAGAACCGTGGCCGCTCCTTCCGTGTTCATCTTCCCCCCTTCCGACGAGCAGCTGAAGTCTGGCACCGCCTCTGTGGTGTGTCTGCTGAACAACTTCTACCCCCGGGAGGCCAAGGTGCAGTGGAAGGTGGACAACGCCCTGCAGTCCGGCAATTCCCAGGAGTCTGTGACCGAGCAGGACTCCAAGGACAGCACCTACTCCCTGTCCTCTACCCTGACCCTGTCCAAGGCCGACTACGAGAAGCACAAGGTGTACGCCTGTGAGGTGACCCACCAGGGCCTGTCCTCTCCTGTGACCAAGTCCTTCAACCGGGGCGAGTGCTGATGAGAATTC

Example 36 Pharmacokinetic and Biodistribution Studies in Mice

The in vivo pharmacokinetics and stability of DX-2240 (produced inHEK293T cells) was determined by iodinating the protein on availabletyrosine residues and measuring plasma clearance and stability in miceafter a single intravenous dose. Samples were radio-iodinated by theindirect method using the IODO-GEN™ reagent (method from Pierce, anddescribed by Chizzonite et al. ((1991) J. Immunol. 147:1548; (1992) J.Immunol. 148: 3117). Samples were incubated with the ¹²⁵I-NaI solutionfor 9 min at which time tyrosine (10 mg/mL, a saturated solution) wasadded to quench the reaction. After about 15 min a 5 μl aliquot wasremoved as a standard for counting. For each labeling reaction, the¹²⁵I-labeled material (approx. 0.6 mL) was purified using a single 5 mLD-salt 1800 polyacrylamide column (Pierce). Columns were washed with 25mM Tris, 0.4 M NaCl, pH 7.5 containing 2.5% HSA to block nonspecificsites then extensively with the same buffer minus the HSA. Samples wereapplied in and columns were eluted with a series of 0.3 mL aliquots.Recovery of applied activity in all protein fractions was >75% and thetotal recovery of applied activity was >90%. The fractions containingpeak levels of labeled protein were pooled for animal injections. Toprepare the injectate, the pool was diluted with Tris buffer (pH 7.5) sothat the 100 μl injection volume contained about 10 μg of labeledmaterial.

Solutions containing the radio-labeled compounds were administered toall mice by injection into the tail vein. At predetermined timespost-administration animals were sacrificed and blood samples were takenfor analyses. Time points tested after injection of radio-labeledcompounds were: approximately 0, 7, 15, 30 and 90 minutes, 4 h, 8 h, 16h, 24 h, 48 h and 72 h after injection. Four animals were sacrificed foreach time point. At sacrifice, 0.5 mL aliquots of blood were collectedinto anticoagulant (0.02 mL EDTA) tubes. Plasma was separated from cellsby centrifugation and the plasma fraction was divided into two aliquots,one frozen and one stored at 4° C. for immediate analysis.

Analyses included gamma counting of all samples. In this single dosei.v. study, DX-2240 exhibited a relatively short-half life in mice ofless than 5 hours. Analysis of the biodistribution of DX-2240 in thesemice revealed some accumulation of this antibody, at 30 minutes, in thelungs (12.85% ID/g), spleen (7.44% ID/g), kidney (8.34% ID/g), liver(5.42% ID/g) and heart (4.04% ID/g). DX-2240, due to its interactionwith Tie1 on the surface of endothelial cells, may accumulate in areasof high vascularization such as the lung. Therefore, multipleadministrations of DX-2240 may be required to achieve an effectivesteady-state level of this antibody in the serum of mice. ELISA onocular bleeds following three every other day dosings, as well asterminal bleed samples from tumor-bearing mice treated with DX-2220,were performed. In each case, levels of DX-2220 in the serum averaged500 μg/ml, suggesting that despite a short serum half-life in mice, aneffective steady-state level of this antibody can be achieved followingjust three doses of DX-2220.

In addition, SEC-HPLC analysis of plasma samples to assess the in vivostability of DX-2240 was performed. Instability of DX-2240 in mousecould have contributed to the fast clearance of this compound from theserum. SEC-HPLC analysis was performed for two plasma samples at timepoints at 0 min, 30 min, 90 min, 24 h and 72 h. The analysis of theradio-labeled DX-2240 showed that this compound is stable in vivo bothto degradation and to interactions with plasma components. Therefore,the relatively rapid half-life of DX-2240 in mice is not due todegradation of this compound.

Example 37 DX-2220 Slows Lung Cancer Xenograft Tumor Progression in NudeMice

The effect of DX-2220 on tumor growth in mice bearing human LNM35 lungcancer xenografts was tested. For these studies, LNM35 cells wereinjected subcutaneously in the lateral thorax of athymic nude mice. Fourdays after tumor cell implantation, treatment was initiated with DX-2220or A2-SV (negative control antibody) at a dosage of 20 mg/kg, threetimes a week. Tumor sizes were measured at day 6, 8 and 10 post antibodytreatment.

As shown in FIG. 6, DX-2220 significantly slowed (˜60%) tumorprogression in this mouse xenograft model (p=0.037). In addition, micetreated with DX-2220 did not exhibit any significant loss in bodyweight. These data coupled demonstrate that DX-2220 possessessignificant tumor growth inhibitory activity in vivo.

Example 38 DX-2220 Slows Tumor Progression in Nude Mice

In addition to the in vivo studies presented above, four additionalmouse xenografts studies were performed. These studies were conductedeither according to the protocols used in the SW-480 or LNM35 study. Theresults from these studies are listed below.

LLC (mouse lung carcinoma) 20% inhibition @ day 14 after start oftreatment PC-3 (human prostate cancer) 24% inhibition @ day 28 afterstart of treatment LNM35 #3 (human lung carcinoma) 30% inhibition @ day21 after start of treatment Colo205 (human colorectal cancer) no effect

These results suggest that the E3 anti-Tie1 antibody has an effect on avariety of tumor types, indicating broad therapeutic applicability.

Example 39 Immunohistochemical Analysis of Normal Tissues

A series of immunohistochemical analyses on a series of non-malignantnormal human tissues to assess potential areas of immunoreactivity ofthe E3 anti-Tie1 antibody was performed. Antibody titration experimentswere conducted on both cryostat and paraformaldehyde fixed sections ofselect normal human tissues with biotinylated DX-2220 and an IgG isotypecontrol antibody to determine the preferred tissue preservationconditions as well as optimal concentration of the antibody that wouldresult in minimal background and maximal detection of signal. Aconcentration of 20 μg/ml for the primary antibody was selected for thestudy with biotinylated DX-2220 and the biotinylated IgG isotype controlantibody used as the primary antibodies, and the principal detectionsystem consisting of Streptavidin HRP with DAB as the chromagen. Tissuesalso were stained with the positive control antibodies (anti-CD31 andanti-vimentin) to ensure that the tissue antigens were preserved andaccessible for immunohistochemical analysis. Only tissues that werepositive for CD31 and vimentin staining were selected for the remainderof the study. The negative control consisted of performing the entireimmunohistochemical procedure on adjacent sections in the absence ofprimary antibody. Slides were imaged with a DVC 1310C digital cameracoupled to a Nikon microscope.

The negative control (no primary antibody) slides showed occasionalfaint background staining within renal tubular epithelium and occasionalgranulocytes, but was uniformly negative in all other cell types,including the positive control cell line (HMEC, Human MicrovascularEndothelial Cells) and positive control colon cancer. The IgG isotypecontrol antibody showed faint background staining of granulocytes,macrophages, adrenal cortex, renal tubular epithelium, fallopian tubeepithelium, hepatocytes, Leydig cells, and thyroid. The positive controlcell line (HMEC) and positive control colon cancer sample showed eitherno staining or background staining.

DX-2220 demonstrated moderate membrane staining within the HMEC cellline, and staining of macrophages, some carcinoma cells, and endothelialcells within the colon cancer positive control samples. Within normaltissues, the antibody showed faint to moderate staining of macrophages,microglia in the brain, squamous epithelium of the cervix, faintstaining of skeletal muscle, islets of Langerhans, and placentalendothelium. These observations are consistent with low level expressionof Tie1 in some endothelial, hematopoietic and epithelial tissues, asanticipated from previous reports. The islets of Langerhans stainingwere unexpected and should be investigated further. Most other faintstaining was similar to that seen with the IgG isotype control. If thebackground from the IgG isotype control is subtracted from the analysisof DX-2220, the majority of tissues were negative, including adrenal,bladder, blood, bone marrow, neurons, breast, colon, endothelium, eye,fallopian tube, heart, kidney, liver, lung, lymphocytes, ovary, exocrinepancreas, pituitary, prostate, skin, spinal cord, spleen, seminiferousepithelium of the testis, thymic lymphocytes, ureter, and uterus.

Example 40 Platelet Studies

It has been reported that Tie1 is expressed on platelets (Tsiamis et al.(2000) J. Vasc. Res. 37(6):437). The possibility of plateletimmunoreactivity with the E3 anti-Tie1 antibody was investigated by FACsanalysis and immunoprecipitation studies. DX-2200 did not showsignificant binding to platelets, nor did it immunoprecipitate Tie1 fromplatelet extracts. In addition, the effect of DX-2200 and DX-2210 onplatelet agglutination and aggregation was investigated. Ristocetin, acofactor that induces platelet agglutination by mediating the binding ofvon Willebrand factor (vWF) to platelet membrane glycoprotein GPIb(CD42), was used as a positive control for platelet agglutination.Antibodies to CD9 were used as a positive control to activate plateletsand induce platelet aggregation, with kinetics and extent comparable tophysiological agonists such as thrombin (reference). Neither the DX-2200nor its light chain germlined variant DX-2210 induced plateletagglutination or aggregation.

Example 41 Chord Blood Stem Cell Studies

To evaluate the binding characteristics to blood progenitor cells (stemcells), FACS analysis with the anti-Tie1 antibody (or the appropriatenegative control antibody) on G-CSF mobilized peripheral blood cells andwith bone marrow cells was performed. Briefly, cells were blocked with10% heat-inactivated human AB serum/2% mouse serum. Binding wasinitiated with biotinylated DX-2220 or biotinylated A2 negative controlantibody. After washing the cells, primary antibodies were detectedusing FITC-labeled streptavidin. Following an additional 30 minuteincubation period, remaining erythrocytes were lysed, and the resultingcell pellet after centrifugation was resuspended in PBS prior to FACSanalysis. Data acquisition was performed on a FACSCanto™(Becton-Dickinson) using FacsDiva™ software. Active gating on SSC/CD45was used. Progenitor cells were gated on CD45⁺ CD34⁺ cells and wereacquired automatically with at least 100,000 CD45⁺ CD34⁺ counted.

While the expression of Tie1 has been reported on certain hematopoieticmalignancies, this experiment demonstrated that neither the negativecontrol IgG A02, nor the E3 anti-Tie1 antibody DX-2220, positivelystained CD45⁺ CD34⁺ blood progenitor cells. This finding supports thehypothesis that targeting Tie1 with E3 should have no deleteriouseffects on stem cells, unlike certain chemotherapeutic agents.

Example 42 In Vitro Hematopoiesis Studies

The effect of anti-Tie1 antibodies (DX-2220 and DX-2240) on humanmyeloid and erythroid progenitors was evaluated usingmethylcellulose-based in vitro colony assays and megakaryocyteprogenitors using collagen-based in vitro assays. Neither DX-2220 norDX-2240 inhibited colony formation in the particular conditions of thisin vitro assay at concentrations up to 100 μg/ml.

The effect of the E3 anti-Tie1 antibody DX-2240 on the recovery of themouse hematopoietic system using an in vivo myeloablation model wasevaluated. Mice were injected with 5-FU on day 0 and then receivedeither DX-2240 or a negative control antibody. At various time pointsfollowing injection (days 2, 4, 6, 8, 10, 12 and 14), 4 mice weresacrificed from control and treated groups and peripheral blood andfemurs were harvested. The peripheral blood and femoral cells wereanalyzed to determine the following:

-   -   Total nucleated cells per femur    -   Frequency of bone marrow colony forming cells for both myeloid        and erythroid progenitors    -   Total hematopoietic CFC per femur    -   Total megakaryocytic CFC per femur    -   Total white blood cell count and differential analysis of mature        cells

DX-2240 had no effect on the recovery of the mouse hematopoietic systemfollowing 5-FU administration. This supports the in vitro findings thatDX-2240 possesses no hematological toxicities under these assayconditions. Thus, it is particularly useful as a therapeutic as it willnot interfere with normal hematopoietic functions required to maintainred cell and lymphocyte production.

The anti-Tie1 antibody was also evaluated for its effect on implantedtumors. Tumor cells were injected subcutaneously into the abdominalregion of mice (Balb/C nu/nu female mice, 5-6 weeks old). The followingtumor cells were tested: a lung carcinoma (mouse syngeneic Lewis lungcarcinoma (LLC)); human lung carcinoma LNM35; an aggressive human coloncarcinoma clone (SW480R). Treatments with anti-Tie1 antibody wereinitiated 4-6 days post-implantation. The anti-Tie1 antibodies or acontrol antibody (the A2 anti-streptavidin antibody) were administeredintraperitoneally at 20 mg/kg every second day. Tumor volume wasmeasured every second day and calculated as 0.5×height×width×depth.

The E3 anti-Tie1 antibody (also termed DX-2240) inhibits primary tumorgrowth of LLC (about a 20% effect, p=0.078; ANOVA, single factor test)and LNM35. In one study, this anti-Tie1 antibody inhibited primary tumorgrowth by 60% (most responsive). (Doubling of the antibody dose withadministration only twice a week rather than every second day resultedin only a modest effect on primary tumor growth). The SW480R tumor wasnot responsive to the antibody treatment under these conditions. Asdescribed in Example 34, the antibody was effective for inhibiting tumorgrowth of SW480 cells (i.e., rather than the derivative SW480R cells).

Histological analysis of tumor sections from the experiment in which 60%inhibition was observed indicated that blood vessels in anti-Tie1antibody treated tumors have a distinct morphology even though bloodvessel density may not be altered. In anti-Tie antibody treated tumors,the vessels form septa-like structures in between lobuli of tumor cells.These tumors also have more necrosis than control antibody treatedtumors. The distribution of smooth muscle cells (as detected byanti-smooth muscle actin antibody staining) was also altered. Thelymphatic vessels in anti-Tie1 antibody treated tumors were also moredispersed, somewhat dilated and in several instances composed ofadjacent lumina clustered together in a string. These observationsindicate that this anti-Tie antibody has a distinctive effect on tumornecrosis and vessel organization within the tumor.

Example 43 Evaluating Combination Therapies

An animal model can be used to evaluate combination therapies. Forexample, the combinations (provided intraperitoneally) can be tested forability to modulate tumor growth in female NCr nu/nu mice withxenografts of HT29, COLO205, or PC3. The following are some exemplarytest regimes:

Dose for HT29 and Compound COLO205 xenografts Schedule PBS 0.2 ml/20 gQ2D × 14; D4 DX-2230  10 mg/kg/inj Q2D × 14; D4 DX-2230 + avastin  10mg/kg/inj; 2.5 mg/kg/inj Q2D × 14; D4, Q3D × 3; D3 avastin 2.5 mg/kg/injQ3D × 3; D4 A2-SV (control)  10 mg/kg/inj Q2D × 14; D4

Another regime is as follows:

Compound Dose for PC3 xenografts Schedule PBS  0.2 ml/20 g Q2D × 14; D4DX-2230  10 mg/kg/inj Q2D × 14; D4 DX-2230 +  10 mg/kg/inj; Q2D × 14;D4, QD × 1; D4 cyclophosphamide 150 mg/kg/inj cyclophosphamide 150mg/kg/inj QD × 1; D4 A2-SV (control)  10 mg/kg/inj Q2D × 14; D4

A2-SV is the control anti-streptavidin antibody. Twelve animals can beused in each group. Clinical signs, mean group weights are evaluatedevery day. Individual body weights and tumor burden are evaluated twiceweekly. At study termination, tissue samples can be obtained fromtumors, liver, lung, spleen, heart, axial node, kidney, and uterus.

Other embodiments are within the following claims:

1-28. (canceled)
 29. An isolated human antibody, or antigen-bindingfragment thereof, that binds to human Tie1 with an affinity K_(D) ofless than 10⁻⁸ M.
 30. The isolated human antibody, or antigen-bindingfragment thereof, of claim 29, which binds to human Tie1 with anaffinity K_(D) of less than 5×10⁻⁹ M.
 31. The isolated human antibody,or antigen-binding fragment thereof, of claim 29, which binds to humanTie1 with an affinity K_(D) of less than 10⁻⁹ M.
 32. An isolated humanantibody, or antigen-binding fragment thereof, that binds to human Tie1with a K_(on) rate of at least 6.19×10³ Ms⁻¹.
 33. The isolated humanantibody, or antigen-binding fragment thereof, of claim 32, which bindsto human Tie1 with a K_(on) rate of at least 7.09×10³ Ms⁻¹.
 34. Anisolated human antibody, or antigen-binding fragment thereof, that bindsto human Tie1 and has a K_(off) rate of 1.02×10⁻³ s⁻¹ or less.
 35. Theisolated human antibody, or antigen-binding fragment thereof, of claim34, which binds to human Tie1 and has a K_(off) rate of 3.67×10⁻⁵ s⁻¹ orless.
 36. The isolated human antibody, or antigen-binding fragmentthereof, of any one of claim 29, 32 or 34, which is a recombinantantibody.
 37. The isolated human antibody, or antigen-binding fragmentthereof, of any one of claim 29, 32 or 34, which is a Fab.
 38. Theisolated human antibody, or antigen-binding fragment thereof, of any oneof claim 29, 32 or 34, which is an IgG.
 39. An isolated human antibodyor antigen-binding fragment thereof, which: induces Tie1 tyrosinephosphorylation; inhibits tube formation by human umbilical endothelialcells (HUVECs) in vitro; inhibits angiogenesis in a MATRIGEL™ in vivoassay; or antagonizes the formation of a Tie1, Tie 2 and Ang heteromericcomplex.
 40. The isolated human antibody, or antigen-binding fragmentthereof, of claim 39, wherein the antibody, or antigen-binding fragmentthereof, has a heavy chain CDR3 comprising the amino acid sequence ofresidues 99-109 of SEQ ID NO:114; and has a light chain CDR3 comprisingthe amino acid sequence of residues 89-96 of SEQ ID NO:116.
 41. Theisolated human antibody, or antigen-binding fragment thereof, of claim39, wherein angiogenesis is inhibited by at least 70% in the MATRIGEL™in vivo assay.
 42. The isolated human antibody, or antigen-bindingfragment thereof, of claim 39, which has no deleterious effect on stemcells.
 43. The isolated human antibody, or antigen-binding fragmentthereof, of claim 39, which does not induce platelet agglutination oraggregation.
 44. An isolated human antibody or antigen-binding fragmentthereof, which dissociates from Tie1 with a K_(off) rate of 1.02×10⁻³s⁻¹ or less and binds to the Tie1 ectodomain.
 45. An isolated humanantibody or antigen-binding fragment thereof, with a light chainvariable region (LCVR) having a CDR3 domain comprising the amino acidsequence of residues 89-96 of SEQ ID NO:116, and with a heavy chainvariable region (HCVR) having a CDR3 domain comprising the amino acidsequence of residues 99-109 of SEQ ID NO:114.
 46. The isolated humanantibody, or antigen-binding fragment thereof, of claim 45, wherein theLCVR further has a CDR2 domain comprising the amino acid sequence ofresidues 50-56 of SEQ ID NO:116 and the HCVR further has a CDR2 domaincomprising the amino acid sequence of residues 50-66 of SEQ ID NO:114.47. The isolated human antibody, or antigen-binding fragment thereof, ofclaim 45, wherein the LCVR further has a CDR1 domain comprising theamino acid sequence of residues 24-34 of SEQ ID NO:116 and the HCVRfurther has a CDR1 domain comprising the amino acid sequence of residues31-35 of SEQ ID NO:114.
 48. A pharmaceutical composition comprising ahuman antibody, or antigen binding portion thereof, and apharmaceutically acceptable carrier, wherein the human antibody, orantigen-binding portion thereof, comprises a light chain CDR3 domaincomprising the amino acid sequence of residues 89-96 of SEQ ID NO:116and a heavy chain CDR3 domain comprising the amino acid sequence ofresidues 99-109 of SEQ ID NO:114.
 49. A pharmaceutical compositioncomprising the human antibody, or antigen-binding portion thereof, ofclaim 29 and a pharmaceutically acceptable carrier.
 50. A method ofinhibiting vascular development in a subject, the method comprisingadministering to a subject having or at risk for a disorder requiringinhibition of vascular development a human antibody, or antigen-bindingfragment thereof, according to claim
 29. 51. The method of claim 50,wherein the human antibody, or antigen-binding fragment thereof, isadministered in an amount effective to decrease vascular development ina subject.
 52. The method of claim 50, wherein the subject has avascular-dependent cancer or tumor.
 53. The method of claim 52, whereinthe tumor is a solid tumor.
 54. The method of claim 50, furthercomprising a second therapy that is an anti-cancer therapy.
 55. Themethod of claim 54, wherein the second therapy is chemotherapy.
 56. Themethod of claim 54, wherein the second therapy comprises administeringbevacizumab.
 57. The method of claim 54, wherein the second therapycomprises administering an agent selected from the group consisting of5-FU, leucovorin, avastin, cyclophosphamide, and/or irinotecan.